Y \ X
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50