#include <bits/stdc++.h>
using namespace std;

int main() {
    int n;
    string s;
    cin >> n >> s;
    vector<int> cnt(26, 0);
    for (char c : s) {
        cnt[c - 'A']++;
    }
    for (int i = 0; i < 26; i++) {
        cout << cnt[i];
    }
    cout << endl;
}