c pwbo 1.1 beta - 20110325 c | Number of variables: 1885 | c | Number of clauses: 6703 | c ============================[ Problem Statistics ]============================= c | | c | Parsing time: 0.01 s | c | Number Variables: 1885 | c | Number Clauses: 4818 | c | Number Cardinality: 0 | c | Number PB Constraints: 0 | c init lb 0 c init ub 1815 c lb 91 (thread 0) c lb 92 (thread 0) c lb 93 (thread 0) c lb 94 (thread 0) c lb 95 (thread 0) c lb 96 (thread 0) c lb 97 (thread 0) c lb 98 (thread 0) c lb 99 (thread 0) c lb 100 (thread 0) c lb 101 (thread 0) c lb 102 (thread 0) c lb 103 (thread 0) c lb 104 (thread 0) c lb 105 (thread 0) c lb 106 (thread 0) c lb 107 (thread 0) c lb 108 (thread 0) c lb 109 (thread 0) c lb 110 (thread 0) c lb 111 (thread 0) c lb 113 (thread 0) c lb 114 (thread 0) c lb 115 (thread 0) c lb 116 (thread 0) c lb 117 (thread 0) c lb 119 (thread 0) c lb 120 (thread 0) c lb 121 (thread 0) c lb 122 (thread 0) c lb 123 (thread 0) c ub 1059 (thread 1) c ub 1058 (thread 1) c ub 1047 (thread 1) c ub 1029 (thread 1) c ub 1028 (thread 1) c ub 1027 (thread 1) c ub 1026 (thread 1) c ub 1025 (thread 1) c ub 1024 (thread 1) c ub 1023 (thread 1) c ub 1022 (thread 1) c ub 1021 (thread 1) c lb 124 (thread 0) c lb 125 (thread 0) c lb 126 (thread 0) c lb 127 (thread 0) c lb 128 (thread 0) c lb 129 (thread 0) c lb 130 (thread 0) c lb 131 (thread 0) c lb 132 (thread 0) c lb 133 (thread 0) c lb 135 (thread 0) c lb 138 (thread 0) c lb 139 (thread 0) c lb 140 (thread 0) c lb 141 (thread 0) c lb 142 (thread 0) c lb 143 (thread 0) c lb 145 (thread 0) c lb 146 (thread 0) c lb 147 (thread 0) c lb 148 (thread 0) c lb 149 (thread 0) c lb 150 (thread 0) c ub 1020 (thread 1) c ub 1019 (thread 1) c ub 1018 (thread 1) c ub 1017 (thread 1) c ub 1016 (thread 1) c ub 1015 (thread 1) c ub 1014 (thread 1) c ub 1013 (thread 1) c ub 1012 (thread 1) c lb 151 (thread 0) c lb 152 (thread 0) c lb 153 (thread 0) c lb 154 (thread 0) c lb 155 (thread 0) c lb 156 (thread 0) c lb 157 (thread 0) c lb 158 (thread 0) c lb 159 (thread 0) c lb 160 (thread 0) c lb 161 (thread 0) c lb 162 (thread 0) c lb 163 (thread 0) c lb 164 (thread 0) c lb 165 (thread 0) c lb 166 (thread 0) c lb 168 (thread 0) c lb 169 (thread 0) c lb 171 (thread 0) c lb 172 (thread 0) c lb 173 (thread 0) c ub 1011 (thread 1) c ub 1010 (thread 1) c ub 1009 (thread 1) c ub 1008 (thread 1) c ub 1007 (thread 1) c ub 1006 (thread 1) c lb 174 (thread 0) c lb 175 (thread 0) c lb 176 (thread 0) c lb 177 (thread 0) c lb 178 (thread 0) c lb 179 (thread 0) c lb 180 (thread 0) c lb 181 (thread 0) c lb 182 (thread 0) c lb 183 (thread 0) c lb 184 (thread 0) c lb 185 (thread 0) c lb 186 (thread 0) c lb 187 (thread 0) c lb 188 (thread 0) c lb 189 (thread 0) c lb 190 (thread 0) c lb 191 (thread 0) c lb 192 (thread 0) c lb 193 (thread 0) c lb 194 (thread 0) c ub 1005 (thread 1) c ub 1004 (thread 1) c ub 1003 (thread 1) c ub 1002 (thread 1) c ub 1001 (thread 1) c ub 1000 (thread 1) c lb 195 (thread 0) c lb 196 (thread 0) c lb 197 (thread 0) c lb 198 (thread 0) c lb 199 (thread 0) c lb 200 (thread 0) c lb 201 (thread 0) c lb 202 (thread 0) c lb 203 (thread 0) c lb 204 (thread 0) c lb 205 (thread 0) c lb 206 (thread 0) c lb 207 (thread 0) c lb 208 (thread 0) c lb 209 (thread 0) c lb 210 (thread 0) c lb 211 (thread 0) c lb 212 (thread 0) c lb 213 (thread 0) c ub 999 (thread 1) c ub 998 (thread 1) c ub 997 (thread 1) c ub 996 (thread 1) c ub 995 (thread 1) c lb 214 (thread 0) c lb 215 (thread 0) c lb 216 (thread 0) c lb 217 (thread 0) c lb 218 (thread 0) c lb 219 (thread 0) c lb 220 (thread 0) c lb 221 (thread 0) c lb 222 (thread 0) c lb 223 (thread 0) c lb 224 (thread 0) c lb 225 (thread 0) c lb 226 (thread 0) c lb 227 (thread 0) c lb 228 (thread 0) c lb 229 (thread 0) c ub 994 (thread 1) c ub 993 (thread 1) c ub 992 (thread 1) c ub 991 (thread 1) c lb 230 (thread 0) c lb 231 (thread 0) c lb 232 (thread 0) c lb 233 (thread 0) c lb 234 (thread 0) c lb 235 (thread 0) c lb 236 (thread 0) c lb 237 (thread 0) c lb 238 (thread 0) c lb 239 (thread 0) c lb 240 (thread 0) c lb 241 (thread 0) c lb 242 (thread 0) c lb 243 (thread 0) c lb 244 (thread 0) c lb 245 (thread 0) c ub 990 (thread 1) c ub 989 (thread 1) c ub 988 (thread 1) c ub 987 (thread 1) c lb 246 (thread 0) c lb 247 (thread 0) c lb 248 (thread 0) c lb 249 (thread 0) c lb 250 (thread 0) c lb 251 (thread 0) c lb 252 (thread 0) c lb 253 (thread 0) c lb 254 (thread 0) c lb 255 (thread 0) c lb 256 (thread 0) c lb 257 (thread 0) c lb 258 (thread 0) c lb 259 (thread 0) c ub 986 (thread 1) c ub 985 (thread 1) c ub 984 (thread 1) c lb 260 (thread 0) c lb 261 (thread 0) c lb 262 (thread 0) c lb 263 (thread 0) c lb 264 (thread 0) c lb 265 (thread 0) c lb 266 (thread 0) c lb 267 (thread 0) c lb 268 (thread 0) c lb 269 (thread 0) c lb 270 (thread 0) c lb 271 (thread 0) c lb 272 (thread 0) c lb 273 (thread 0) c ub 983 (thread 1) c ub 982 (thread 1) c ub 981 (thread 1) c ub 980 (thread 1) c lb 274 (thread 0) c lb 275 (thread 0) c lb 276 (thread 0) c lb 277 (thread 0) c lb 278 (thread 0) c lb 279 (thread 0) c lb 280 (thread 0) c lb 281 (thread 0) c lb 282 (thread 0) c lb 283 (thread 0) c lb 284 (thread 0) c lb 285 (thread 0) c lb 286 (thread 0) c ub 979 (thread 1) c ub 978 (thread 1) c ub 977 (thread 1) c lb 287 (thread 0) c lb 288 (thread 0) c lb 289 (thread 0) c lb 290 (thread 0) c lb 291 (thread 0) c lb 292 (thread 0) c lb 293 (thread 0) c lb 294 (thread 0) c lb 295 (thread 0) c lb 296 (thread 0) c lb 297 (thread 0) c lb 298 (thread 0) c lb 299 (thread 0) c ub 976 (thread 1) c ub 975 (thread 1) c ub 974 (thread 1) c lb 300 (thread 0) c lb 301 (thread 0) c lb 302 (thread 0) c lb 303 (thread 0) c lb 304 (thread 0) c lb 305 (thread 0) c lb 306 (thread 0) c lb 307 (thread 0) c lb 308 (thread 0) c lb 309 (thread 0) c lb 310 (thread 0) c lb 311 (thread 0) c ub 973 (thread 1) c ub 972 (thread 1) c ub 971 (thread 1) c lb 312 (thread 0) c lb 313 (thread 0) c lb 314 (thread 0) c lb 315 (thread 0) c lb 316 (thread 0) c lb 317 (thread 0) c lb 318 (thread 0) c lb 319 (thread 0) c lb 320 (thread 0) c lb 321 (thread 0) c lb 322 (thread 0) c lb 323 (thread 0) c ub 970 (thread 1) c ub 969 (thread 1) c lb 324 (thread 0) c lb 325 (thread 0) c lb 326 (thread 0) c lb 327 (thread 0) c lb 328 (thread 0) c lb 329 (thread 0) c lb 330 (thread 0) c lb 331 (thread 0) c lb 332 (thread 0) c lb 333 (thread 0) c lb 334 (thread 0) c lb 335 (thread 0) c ub 968 (thread 1) c ub 967 (thread 1) c ub 966 (thread 1) c lb 336 (thread 0) c lb 337 (thread 0) c lb 338 (thread 0) c lb 339 (thread 0) c lb 340 (thread 0) c lb 341 (thread 0) c lb 342 (thread 0) c lb 343 (thread 0) c lb 344 (thread 0) c lb 345 (thread 0) c lb 346 (thread 0) c lb 347 (thread 0) c ub 965 (thread 1) c ub 964 (thread 1) c ub 963 (thread 1) c lb 348 (thread 0) c lb 349 (thread 0) c lb 350 (thread 0) c lb 351 (thread 0) c lb 352 (thread 0) c lb 353 (thread 0) c lb 354 (thread 0) c lb 355 (thread 0) c lb 356 (thread 0) c lb 357 (thread 0) c lb 358 (thread 0) c ub 962 (thread 1) c ub 961 (thread 1) c lb 359 (thread 0) c lb 360 (thread 0) c lb 361 (thread 0) c lb 362 (thread 0) c lb 363 (thread 0) c lb 364 (thread 0) c lb 365 (thread 0) c lb 366 (thread 0) c lb 367 (thread 0) c lb 368 (thread 0) c lb 369 (thread 0) c lb 370 (thread 0) c ub 960 (thread 1) c ub 959 (thread 1) c ub 958 (thread 1) c lb 371 (thread 0) c lb 372 (thread 0) c lb 373 (thread 0) c lb 374 (thread 0) c lb 375 (thread 0) c lb 376 (thread 0) c lb 377 (thread 0) c lb 378 (thread 0) c lb 379 (thread 0) c lb 380 (thread 0) c lb 381 (thread 0) c lb 382 (thread 0) c lb 383 (thread 0) c lb 384 (thread 0) c lb 385 (thread 0) c lb 386 (thread 0) c lb 387 (thread 0) c lb 388 (thread 0) c lb 389 (thread 0) c lb 390 (thread 0) c lb 391 (thread 0) c lb 392 (thread 0) c lb 393 (thread 0) c lb 394 (thread 0) c lb 395 (thread 0) c lb 396 (thread 0) c lb 397 (thread 0) c lb 398 (thread 0) c lb 399 (thread 0) c lb 400 (thread 0) c lb 401 (thread 0) c lb 402 (thread 0) c ub 957 (thread 1) c ub 956 (thread 1) c ub 955 (thread 1) c lb 403 (thread 0) c lb 404 (thread 0) c lb 405 (thread 0) c lb 406 (thread 0) c lb 407 (thread 0) c lb 408 (thread 0) c lb 409 (thread 0) c lb 410 (thread 0) c lb 411 (thread 0) c lb 412 (thread 0) c ub 954 (thread 1) c ub 953 (thread 1) c lb 413 (thread 0) c lb 414 (thread 0) c lb 415 (thread 0) c lb 416 (thread 0) c lb 417 (thread 0) c lb 418 (thread 0) c lb 419 (thread 0) c lb 420 (thread 0) c lb 421 (thread 0) c lb 422 (thread 0) c ub 952 (thread 1) c ub 951 (thread 1) c lb 423 (thread 0) c lb 424 (thread 0) c lb 425 (thread 0) c lb 426 (thread 0) c lb 427 (thread 0) c lb 428 (thread 0) c lb 429 (thread 0) c lb 430 (thread 0) c lb 431 (thread 0) c lb 432 (thread 0) c ub 950 (thread 1) c ub 949 (thread 1) c lb 433 (thread 0) c lb 434 (thread 0) c lb 435 (thread 0) c lb 436 (thread 0) c lb 437 (thread 0) c lb 438 (thread 0) c lb 439 (thread 0) c lb 440 (thread 0) c lb 441 (thread 0) c lb 442 (thread 0) c ub 948 (thread 1) c ub 947 (thread 1) c ub 946 (thread 1) c lb 443 (thread 0) c lb 444 (thread 0) c lb 445 (thread 0) c lb 446 (thread 0) c lb 447 (thread 0) c lb 448 (thread 0) c lb 449 (thread 0) c lb 450 (thread 0) c lb 451 (thread 0) c lb 452 (thread 0) c ub 945 (thread 1) c ub 944 (thread 1) c lb 453 (thread 0) c lb 454 (thread 0) c lb 455 (thread 0) c lb 456 (thread 0) c lb 457 (thread 0) c lb 458 (thread 0) c lb 459 (thread 0) c lb 460 (thread 0) c lb 461 (thread 0) c ub 943 (thread 1) c ub 942 (thread 1) c lb 462 (thread 0) c lb 463 (thread 0) c lb 464 (thread 0) c lb 465 (thread 0) c lb 466 (thread 0) c lb 467 (thread 0) c lb 468 (thread 0) c lb 469 (thread 0) c lb 470 (thread 0) c lb 471 (thread 0) c ub 941 (thread 1) c lb 472 (thread 0) c lb 473 (thread 0) c lb 474 (thread 0) c lb 475 (thread 0) c lb 476 (thread 0) c lb 477 (thread 0) c lb 478 (thread 0) c lb 479 (thread 0) c ub 940 (thread 1) c ub 939 (thread 1) c lb 480 (thread 0) c lb 481 (thread 0) c lb 482 (thread 0) c lb 483 (thread 0) c lb 484 (thread 0) c lb 485 (thread 0) c lb 486 (thread 0) c lb 487 (thread 0) c lb 488 (thread 0) c ub 938 (thread 1) c lb 489 (thread 0) c lb 490 (thread 0) c lb 491 (thread 0) c lb 492 (thread 0) c lb 493 (thread 0) c lb 494 (thread 0) c lb 495 (thread 0) c lb 496 (thread 0) c lb 497 (thread 0) c ub 937 (thread 1) c ub 936 (thread 1) c lb 498 (thread 0) c lb 499 (thread 0) c lb 500 (thread 0) c lb 501 (thread 0) c lb 502 (thread 0) c lb 503 (thread 0) c lb 504 (thread 0) c lb 505 (thread 0) c lb 506 (thread 0) c ub 935 (thread 1) c lb 507 (thread 0) c lb 508 (thread 0) c lb 509 (thread 0) c lb 510 (thread 0) c lb 511 (thread 0) c lb 512 (thread 0) c lb 513 (thread 0) c lb 514 (thread 0) c lb 515 (thread 0) c lb 516 (thread 0) c lb 517 (thread 0) c lb 518 (thread 0) c lb 519 (thread 0) c lb 520 (thread 0) c lb 521 (thread 0) c lb 522 (thread 0) c ub 934 (thread 1) c lb 523 (thread 0) c lb 524 (thread 0) c lb 525 (thread 0) c lb 526 (thread 0) c lb 527 (thread 0) c lb 528 (thread 0) c lb 529 (thread 0) c lb 530 (thread 0) c lb 531 (thread 0) c lb 532 (thread 0) c lb 533 (thread 0) c lb 534 (thread 0) c lb 535 (thread 0) c lb 536 (thread 0) c lb 537 (thread 0) c lb 538 (thread 0) c ub 933 (thread 1) c lb 539 (thread 0) c lb 540 (thread 0) c lb 541 (thread 0) c lb 542 (thread 0) c lb 543 (thread 0) c lb 544 (thread 0) c lb 545 (thread 0) c lb 546 (thread 0) c ub 932 (thread 1) c lb 547 (thread 0) c lb 548 (thread 0) c lb 549 (thread 0) c lb 550 (thread 0) c lb 551 (thread 0) c lb 552 (thread 0) c lb 553 (thread 0) c ub 931 (thread 1) c ub 930 (thread 1) c lb 554 (thread 0) c lb 555 (thread 0) c lb 556 (thread 0) c lb 557 (thread 0) c lb 558 (thread 0) c lb 559 (thread 0) c lb 560 (thread 0) c lb 561 (thread 0) c ub 929 (thread 1) c ub 928 (thread 1) c lb 562 (thread 0) c lb 563 (thread 0) c lb 564 (thread 0) c lb 565 (thread 0) c lb 566 (thread 0) c lb 567 (thread 0) c lb 568 (thread 0) c ub 927 (thread 1) c ub 926 (thread 1) c lb 569 (thread 0) c lb 570 (thread 0) c lb 571 (thread 0) c lb 572 (thread 0) c lb 573 (thread 0) c lb 574 (thread 0) c ub 925 (thread 1) c lb 575 (thread 0) c lb 576 (thread 0) c lb 577 (thread 0) c lb 578 (thread 0) c lb 579 (thread 0) c lb 580 (thread 0) c lb 581 (thread 0) c ub 924 (thread 1) c ub 923 (thread 1) c lb 582 (thread 0) c lb 583 (thread 0) c lb 584 (thread 0) c lb 585 (thread 0) c lb 586 (thread 0) c lb 587 (thread 0) c ub 922 (thread 1) c ub 921 (thread 1) c lb 588 (thread 0) c lb 589 (thread 0) c lb 590 (thread 0) c lb 591 (thread 0) c lb 592 (thread 0) c lb 593 (thread 0) c ub 920 (thread 1) c lb 594 (thread 0) c lb 595 (thread 0) c lb 596 (thread 0) c lb 597 (thread 0) c lb 598 (thread 0) c ub 919 (thread 1) c ub 918 (thread 1) c lb 599 (thread 0) c lb 600 (thread 0) c lb 601 (thread 0) c lb 602 (thread 0) c lb 603 (thread 0) c lb 604 (thread 0) c ub 917 (thread 1) c ub 916 (thread 1) c lb 605 (thread 0) c lb 606 (thread 0) c lb 607 (thread 0) c lb 608 (thread 0) c lb 609 (thread 0) c ub 915 (thread 1) c lb 610 (thread 0) c lb 611 (thread 0) c lb 612 (thread 0) c lb 613 (thread 0) c lb 614 (thread 0) c ub 914 (thread 1) c ub 913 (thread 1) c lb 615 (thread 0) c lb 616 (thread 0) c lb 617 (thread 0) c lb 618 (thread 0) c lb 619 (thread 0) c lb 620 (thread 0) c lb 621 (thread 0) c lb 622 (thread 0) c lb 623 (thread 0) c lb 624 (thread 0) c lb 625 (thread 0) c ub 912 (thread 1) c lb 626 (thread 0) c lb 627 (thread 0) c lb 628 (thread 0) c lb 629 (thread 0) c lb 630 (thread 0) c ub 911 (thread 1) c ub 910 (thread 1) c lb 631 (thread 0) c lb 632 (thread 0) c lb 633 (thread 0) c lb 634 (thread 0) c lb 635 (thread 0) c ub 909 (thread 1) c lb 636 (thread 0) c lb 637 (thread 0) c lb 638 (thread 0) c lb 639 (thread 0) c ub 908 (thread 1) c lb 640 (thread 0) c lb 641 (thread 0) c lb 642 (thread 0) c lb 643 (thread 0) c ub 907 (thread 1) c ub 906 (thread 1) c lb 644 (thread 0) c lb 645 (thread 0) c lb 646 (thread 0) c ub 905 (thread 1) c lb 647 (thread 0) c lb 648 (thread 0) c lb 649 (thread 0) c ub 904 (thread 1) c ub 903 (thread 1) c lb 650 (thread 0) c ub 902 (thread 1) c lb 651 (thread 0) c ub 901 (thread 1) c ub 900 (thread 1) c lb 652 (thread 0) c lb 653 (thread 0) c ub 899 (thread 1) c ub 898 (thread 1) c ub 897 (thread 1) c lb 654 (thread 0) c ub 896 (thread 1) c lb 655 (thread 0) c lb 656 (thread 0) c lb 657 (thread 0) c lb 658 (thread 0) c ub 895 (thread 1) c lb 659 (thread 0) c ub 894 (thread 1) c ub 893 (thread 1) c ub 892 (thread 1) c ub 891 (thread 1) c lb 660 (thread 0) c ub 890 (thread 1) c ub 889 (thread 1) c lb 661 (thread 0) c ub 888 (thread 1) c lb 662 (thread 0) c ub 887 (thread 1) c ub 886 (thread 1) c ub 885 (thread 1) c ub 884 (thread 1) c ub 883 (thread 1) c ub 882 (thread 1) c ub 881 (thread 1) c ub 880 (thread 1) c lb 663 (thread 0) c ub 879 (thread 1) c ub 878 (thread 1) c ub 877 (thread 1) c lb 664 (thread 0) c ub 876 (thread 1) c ub 875 (thread 1) c ub 874 (thread 1) c ub 873 (thread 1) c lb 665 (thread 0) c ub 872 (thread 1) c lb 666 (thread 0) c ub 871 (thread 1) c ub 870 (thread 1) c ub 869 (thread 1) c ub 868 (thread 1) c ub 867 (thread 1) c ub 866 (thread 1) c ub 865 (thread 1) c ub 864 (thread 1) c ub 863 (thread 1) c ub 862 (thread 1) c ub 861 (thread 1) c ub 860 (thread 1) c ub 859 (thread 1) c ub 858 (thread 1) c ub 857 (thread 1) c ub 856 (thread 1) c ub 855 (thread 1) c ub 854 (thread 1) c ub 853 (thread 1) c ub 852 (thread 1) c ub 851 (thread 1) c ub 850 (thread 1) c ub 849 (thread 1) c ub 848 (thread 1) c ub 847 (thread 1) c ub 846 (thread 1) c ub 845 (thread 1) c ub 844 (thread 1) c ub 843 (thread 1) c ub 842 (thread 1) c ub 841 (thread 1) c ub 840 (thread 1) c ub 839 (thread 1) c ub 838 (thread 1) c ub 837 (thread 1) c ub 836 (thread 1) c ub 835 (thread 1) c ub 834 (thread 1) c ub 833 (thread 1) c ub 832 (thread 1) c ub 831 (thread 1) c ub 830 (thread 1) c ub 829 (thread 1) c ub 828 (thread 1) c ub 827 (thread 1) c ub 826 (thread 1) c ub 825 (thread 1) c ub 824 (thread 1) c ub 823 (thread 1) c ub 822 (thread 1) c ub 821 (thread 1) c ub 820 (thread 1) c ub 819 (thread 1) c ub 818 (thread 1) c ub 817 (thread 1) c ub 816 (thread 1) c ub 815 (thread 1) c ub 814 (thread 1) c ub 813 (thread 1) c ub 812 (thread 1) c ub 811 (thread 1) c ub 810 (thread 1) c ub 809 (thread 1) c ub 808 (thread 1) c ub 807 (thread 1) c ub 806 (thread 1) c ub 805 (thread 1) c ub 804 (thread 1) c ub 803 (thread 1) c ub 802 (thread 1) c ub 801 (thread 1) c ub 800 (thread 1) c ub 799 (thread 1) c ub 798 (thread 1) c ub 797 (thread 1) c ub 796 (thread 1) c ub 795 (thread 1) c ub 794 (thread 1) c ub 793 (thread 1) c ub 792 (thread 1) c ub 791 (thread 1) c ub 790 (thread 1) c ub 789 (thread 1) c ub 788 (thread 1) c ub 787 (thread 1) c ub 786 (thread 1) c ub 785 (thread 1) c ub 784 (thread 1) c ub 783 (thread 1) c ub 782 (thread 1) c ub 781 (thread 1) c ub 780 (thread 1) c ub 779 (thread 1) c ub 778 (thread 1) c ub 777 (thread 1) c ub 776 (thread 1) c ub 775 (thread 1) c ub 774 (thread 1) c ub 773 (thread 1) c ub 772 (thread 1) c ub 771 (thread 1) c ub 770 (thread 1) c ub 769 (thread 1) c ub 768 (thread 1) c ub 767 (thread 1) c ub 766 (thread 1) c ub 765 (thread 1) c Memory used : 133.95 MB c CPU time : 51.2252 s