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.

Input

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.

Output

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.

Examples

Input

1
abca


Output

YES
abca


Input

2
aaacas


Output

YES
aaa
cas


Input

4
abc


Output

NO

Note

In the second sample there are two possible answers: {"aaaca", "s"} and {"aaa", "cas"}.
from collections import *
from heapq import *
from bisect import *
from math import *
from itertools import *
import sys
inf=float('inf')

if __name__ == "__main__":
	# tcase = int(raw_input())
	# while tcase>0:

	# 	tcase-=1
	k =  int(input())
	s =  str(input())
	l = []

	for i in s:
	    if not i in l:
	        l.append(i)

	vals = []

	if len(l) < k:
	    print("NO")
	    sys.exit(0)
	else:
	    print("YES")
	    for i in range(k):
	        vals.append(s.index(l[i]))

	for i in range(k):
	    if i == k-1:
	        print(s[vals[len(vals) - 1] : len(s)])
	    else:
	        print(s[vals[i] : vals[i + 1]])