#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

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

    vector<int> cnt(26, 0);
    for(char c : S) cnt[c - 'A']++;

    for(int c : cnt) cout << c;
    cout << endl;
    return 0;
}