1) (2,3), (4,5), (7,9), (11,12), (14,15), (16,17), (25,27)2) (63,72), (73,75), (81,85), (87,91), (93,99), (101,103), (121)3) (2,3), (7,9), (12,13), (15,16), (17,25), (27,51), (63,72)
1) (2,3), (4,5), (7,9), (11,12), (14,15), (16,17), (25,27)
2) (63,72), (73,75), (81,85), (87,91), (93,99), (101,103), (121)
3) (2,3), (7,9), (12,13), (15,16), (17,25), (27,51), (63,72)