4C1x5C1=20种,分别是
23666,26366,26636,26663,
32666,36266,36626,36662,
63266,
62366,63626,62636,63662,62663,
66236,66326,66263,66362,
66623,66632
4C1x5C1=20种,分别是
23666,26366,26636,26663,
32666,36266,36626,36662,
63266,
62366,63626,62636,63662,62663,
66236,66326,66263,66362,
66623,66632