#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
typedef vector<P> VP;
typedef vector<ll> VI;
typedef vector<VI> VVI;
#define REP(i, n) for (ll i = 0; i < (n); i++)
#define ALL(v) v.begin(), v.end()
#define OUT(n) cout << n << "\n"
// constexpr ll MOD=998244353;
// constexpr ll MOD=1000000007;
// constexpr ll INF=2e18;

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

    ll N;
    string S;
    cin >> N >> S;

    VI cnt(26);
    REP(i, N)
    {
        cnt[S[i] - 'A']++;
    }

    string ans = "";
    REP(i, 26)
    {
        ans += to_string(cnt[i]);
    }

    OUT(ans);
}