Y \ X
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
10870
10869
10868
10867
10866
10865
10864
10863
10862
10861
10860
10859
10858
10857
10856
10855
10854
10853
10852
10851
10850