#include <iostream>
#include <algorithm>
using namespace std;
int n; 
string s;
int v[26];

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

    for (int i = 0; i < n; i++) {
        v[s[i]-'A']++;
    }
    
    for (int i = 0; i < 26; i++) {
        cout << v[i];
    }
    cout << endl;


    return 0;
}