#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); i++)
using namespace std;
using ll = long long;
using P = pair<int, int>;
 
int main() {
    int n;
    cin >> n;
    int n = n % 10;
    if (n == 2 || n == 4 || n == 5 || n == 7 || n == 9) {
        cout << "hon";
    } else if (n == 0 || n == 1 || n == 6 || n == 8) {
        cout << "pon";
    }else {
        cout << "bon";
    }
    
    return 0;
}