无冗余的输入两个字符串，并对其进行拼接，

1）输出拼接后的字符串。例如，string buff stringbuff

2）对于拼接后的字符串，输出奇数下标组成的子串和偶数下标组成的子串。 例如，srnbf tiguf

3）对于奇数下标组成的子串以及偶数下标组成的子串进行排序。例如bfnrs fgitu-Non-redundant input two strings, and its mosaic,

   　1) String output spliced. For example, string buff stringbuff

   　2) For the substring spliced, substring output index composed of odd and even-numbered index composed of strings. For example, srnbf tiguf

   　3) substring index composed for odd and even sub-index by a string sort. For example bfnrs fgitu