#include <cassert>
#include <iostream>
#include <map>
using namespace std;

int main() {
    int n;
    string s;
    cin >> n >> s;

    map<char, int> count;
    for (char c : s) {
        count[c] += 1;
    }

    for (char c = 'A'; c <= 'Z'; ++c) {
        cout << count[c];
    }
    cout << endl;
    return 0;
}