Question

пож решите даю 15 баллов

Answer 1

1) 278, 287, 728, 782, 827, 872,

2) 509, 590, 905, 950,

3) 456, 457, 465, 467, 475, 476, 567, 576, 546, 564, 547, 574, 645, 654, 657, 675, 647, 674, 745, 754, 756, 765, 746, 764