Y \ X
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
7980
7979
7978
7977
7976
7975
7974
7973
7972
7971
7970
7969
7968
7967
7966
7965
7964
7963
7962
7961
7960