X | |||||||
Xa | Xb | ||||||
Xaa | Xab | Xba | Xbb | ||||
Xaaa | Xaab | Xaba | Xabb | Xbaa | Xbab | Xbba | Xbbb |
(11, 33) (55, 77) (15, 37) (51, 73) | (13, 31) (57, 75) (17, 35) (53, 75) | (22, 44) (66, 88) (26, 48) (62, 84) | (24, 42) (68, 86) (28, 46) (62, 84) | (12, 34) (56, 78) (16, 38) (52, 74) | (14, 32) (58, 76) (18, 36) (54, 72) | (21, 43) (65, 87) (25, 47) (61, 83) | (23, 41) (67, 85) (27, 45) (63, 81) |