#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>
#include <queue>
#include <stack>
#include <unordered_set>
#include <unordered_map>

using namespace std;

typedef long long int ll;
typedef pair<int, int> Pii;

const ll mod = 998244353;

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  int n;
  cin >> n;
  string s;
  cin >> s;

  vector<int> appear_count(26);
  for (auto &x: s) appear_count[x - 'A']++;

  for (auto &x: appear_count) cout << x;
  cout << endl;

  return 0;
}