#include<bits/stdc++.h>
#include<atcoder/all>
#define chmin(x,y) (x) = min((x),(y))
#define chmax(x,y) (x) = max((x),(y))
#define ld long double
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
const ll mod = 998244353;
// using Graph = vector<vector<pair<int,int>>>;
using Graph = vector<vector<int>>;
const vector<int> dx = {1,0,-1,0}, dy = {0,1,0,-1};

int main(){
  // input
  int n; string s;
  cin >> n >> s;
  vector<int> v(26);
  for(int i = 0 ; i < n; i++){
  	int c = s[i]- 'A';
  	v[c]++;
  }
  
  for(int i = 0; i < 26; i++) cout << v[i];
  cout << endl;
  
  // solve
  
  // output
  
}