#include<iostream>
#include<vector>
using namespace std;
int main()
{
  vector<int>ans(26,0);
  int n;
  string s;
  cin >> n >> s;
  for(int i=0;i<n;i++)ans[(int)s[i]-65]++;
  for(int i=0;i<26;i++)cout << ans[i];
  cout << endl;
}