Y \ X
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
15640
15639
15638
15637
15636
15635
15634
15633
15632
15631
15630
15629
15628
15627
15626
15625
15624
15623
15622
15621
15620