#include <iostream>
#include <cassert>

using namespace std;

int cnt[26];

int main() {
  int N; string S; cin >> N >> S;

  for (char c: S) {
    cnt[c - 'A']++;
  }

  for (int i = 0; i < 26; i++) {
    cout << cnt[i];
  }
  cout << endl;
  return 0;
}