#include <bits/stdc++.h>
#include <atcoder/all>

using namespace std;
using namespace atcoder;

using ll = long long;

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

    vector<ll> c(26);
    for (ll i = 0; i < N; i++) {
        c[S[i] - 'A']++;
    }
    for (ll i = 0; i < 26; i++) {
        cout << c[i];
    }
    cout << endl;

    return 0;
}