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
4100
4099
4098
4097
4096
4095
4094
4093
4092
4091
4090
4089
4088
4087
4086
4085
4084
4083
4082
4081
4080