Y \ X
940
941
942
943
944
945
946
947
948
949
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
10000
9999
9998
9997
9996
9995
9994
9993
9992
9991
9990
9989
9988
9987
9986
9985
9984
9983
9982
9981
9980