Y \ X
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
15570
15569
15568
15567
15566
15565
15564
15563
15562
15561
15560
15559
15558
15557
15556
15555
15554
15553
15552
15551
15550