#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all> 
using mint = atcoder::modint998244353;
#define int long long
signed main() {
  int n;
  string s;
  cin >> n >> s;
  vector<int> c(26,0);
  for(int i = 0; i < n; i++) {
    int f = s[i]-'A';
    c[f]++;
  }
  for(int i = 0; i < 26; i++) cout << c[i];
  cout << endl;
}