import collections,sys,math,functools,operator,itertools,bisect,heapq,decimal,string,time,random
#sys.setrecursionlimit(10**9)
#sys.set_int_max_str_digits(0)
#input = sys.stdin.readline
n = int(input())
#alist = list(map(int,input().split()))
#alist = []
s = input()
for i in range(26):
    print(s.count(chr(ord('A') + i)),end='')