#include <iostream>
#include <string>
using namespace std;

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

    int count[26] = {0};
    for (char c : S) {
        count[c - 'A']++;
    }

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