20
 1000 1000 
 4 166 450 182 0 314 0 388 536
 4 588 524 1000 678 1000 1000 924 1000
 6 166 450 388 536 494 1000 0 1000 0 0 182 0
 4 922 750 866 1000 598 1000 532 400
 4 276 64 1000 356 1000 670 522 1000
 4 118 376 350 1000 0 1000 0 344
 5 388 536 314 0 488 0 598 1000 494 1000
 8 118 376 0 344 0 0 1000 0 1000 356 276 64 522 1000 350 1000
 3 1000 670 1000 1000 522 1000
 3 0 306 0 0 458 0
 7 84 454 488 1000 0 1000 0 314 588 0 1000 0 1000 332
 4 254 618 188 0 438 0 1000 480
 5 788 860 458 0 1000 0 1000 1000 866 1000
 4 694 860 762 1000 0 1000 0 306
 6 254 618 1000 480 1000 1000 0 1000 0 0 188 0
 3 0 314 0 0 588 0
 6 788 860 866 1000 762 1000 694 860 0 306 458 0
 6 84 454 1000 332 1000 678 588 524 924 1000 488 1000
 6 922 750 532 400 488 0 1000 0 1000 1000 866 1000
 3 438 0 1000 0 1000 480