15
 1000 1000 
 3 722 0 1000 0 1000 158
 3 0 320 0 0 586 0
 4 596 320 586 0 1000 0 1000 218
 7 592 550 418 1000 0 1000 0 0 722 0 1000 158 1000 492
 4 1000 428 1000 1000 0 1000 0 752
 4 808 488 680 1000 0 1000 0 650
 5 388 190 1000 244 1000 406 0 488 0 274
 6 596 320 1000 218 1000 1000 0 1000 0 320 586 0
 4 706 1000 0 1000 0 0 264 0
 6 808 488 0 650 0 488 1000 406 1000 1000 680 1000
 4 264 0 1000 0 1000 1000 706 1000
 5 768 268 1000 180 1000 428 0 752 0 214
 5 768 268 0 214 0 0 1000 0 1000 180
 5 388 190 0 274 0 0 1000 0 1000 244
 4 592 550 1000 492 1000 1000 418 1000