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

int main() {
	int N; cin >> N;
	string S; cin >> S;
	vector<int> alp(26);
	for (int i = 0; i < N; i++) {
		alp[S[i] - 'A']++;
	}
	for (int i = 0; i < 26; i++) {
		cout << alp[i];
	}
	cout << endl;
	
}