/*

*/
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define rep(i, n) for(int i = 0; i < (int)(n); i++)

int main(){

  int n;
  cin >> n;
  string s;
  cin >> s;

  string alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  int cnt;
  rep(i, alphabet.length()){
    cnt = count(s.begin(), s.end(), alphabet[i]);
    cout << cnt;
  }
  cout << endl;

  return 0;
}