多米诺骨牌是一个小正方形方块，每个骨牌都标有一个数字（0~6），现在有28组骨牌，每组两个，各组编号为1~28，每组编号对应的两个骨牌数值如下：

-Dominoes is a small square box, and each domino is marked with a number (0 ~ 6), now has 28 group of dominoes, two in each group, the group numbered 1 to 28, each number corresponds to two dominoes values are as follows: