Input
(2, 4), (3, 5), (6, 8), (7, 10), (9, 12), (11, 13), (14, 15), (16, 17), (18, 19), (20, 21), (22, 24), (23, 25), (26, 28), (27, 30), (29, 32), (31, 33), (34, 35), (36, 37), (38, 40), (39, 42), (41, 44), (43, 45), (46, 47), (48, 49), (50, 51), (52, 53), (54, 56), (55, 58), (57, 59), (60, 61), (62, 64), (63, 66), (65, 68), (67, 69), (70, 72), (71, 73), (74, 75), (76, 77), (78, 80), (79, 81), (82, 83), (84, 86), (85, 88), (87, 90), (89, 92), (91, 94), (93, 96), (95, 98), (97, 99), (100, 102), (101, 104), (103, 106), (105, 107), (108, 109), (110, 111), (112, 113), (114, 116), (115, 117), (118, 120), (119, 121), (122, 124), (123, 126), (125, 128), (127, 129), (130, 132), (131, 134), (133, 136), (135, 1)
87, 90, 74, 75
Output
(2, 4), (3, 5), (6, 8), (7, 10), (9, 12), (11, 13), (14, 15), (16, 17), (18, 19), (20, 21), (22, 24), (23, 25), (26, 28), (27, 30), (29, 32), (31, 33), (34, 35), (36, 37), (38, 40), (39, 42), (41, 44), (43, 45), (46, 47), (48, 49), (50, 51), (52, 53), (54, 56), (55, 58), (57, 59), (60, 61), (62, 64), (63, 66), (65, 68), (67, 69), (70, 72), (71, 73), (76, 77), (78, 80), (79, 81), (82, 83), (84, 86), (85, 88), (89, 92), (91, 94), (93, 96), (95, 98), (97, 99), (100, 102), (101, 104), (103, 106), (105, 107), (108, 109), (110, 111), (112, 113), (114, 116), (115, 117), (118, 120), (119, 121), (122, 124), (123, 126), (125, 128), (127, 129), (130, 132), (131, 134), (133, 136), (135, 1), (87, 74), (90, 75)