Y \ X
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
991
992
993
994
995
996
997
998
999
1000
990
989
988
987
986
985
984
983
982
981
980
979
978
977
976
975
974
973
972
971
970