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"}.
import sys
import math
import collections
import bisect
def get_ints(): return map(int, sys.stdin.readline().strip().split())
def get_list(): return list(map(int, sys.stdin.readline().strip().split()))
def get_string(): return sys.stdin.readline().strip()
for t in range(1):
    n=int(input())
    string=list(get_string())
    if len(set(string))<n:
        print("NO")
        continue
    selected=set()
    selected.add(string[0])
    ans=[]
    left=0
    counted=0
    for i in range(1,len(string)+2):
        if counted==n-1:
            sub_string=string[left:]
            ans.append(sub_string)
            break
        else:
            sub_string=string[left:i]
        if sub_string[-1] not in selected:
            selected.add(sub_string[-1])
            ans.append(sub_string[:len(sub_string)-1])
            selected.add(sub_string[0])
            left=i-1
            counted+=1
    print("YES")
    for i in ans:
        print(*i,sep="")