#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  string S;
  cin >> S;
  bool ok = true;
  if (S[0] != 'Q'){
    ok = false;
  }
  for (int i = 1; i < N; i++){
    if (S[i] != 'H' && S[i] != 'Q' && S[i] != '9' && S[i] != '+'){
      ok = false;
    }
  }
  if (ok){
    cout << S << endl;
  } else {
    cout << -1 << endl;
  }
}