A. Set of Strings
implementation; strings
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 ≤ k ≤ 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""}.