You are given a string q. A sequence of k strings s1,s2,...,sk is called beautiful, if the concatenation of these strings is string q (formally, s1+s2+...+sk=q) and the first characters of these strings are distinct.

Find any beautiful sequence of strings or determine that the beautiful sequence doesn't exist.

The first line contains a positive integer k (1 \le k \le 26) - the number of strings that should be in a beautiful sequence.

The second line contains string q, consisting of lowercase Latin letters. The length of the string is within range from 1 to 100, inclusive.

If such sequence doesn't exist, then print in a single line "NO" (without the quotes). Otherwise, print in the first line "YES" (without the quotes) and in the next k lines print the beautiful sequence of strings s1,s2,...,sk.

If there are multiple possible answers, print any of them.

In the second sample there are two possible answers: {"aaaca","s"} and {"aaa","cas"}.