#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;
    vector<string> s;
    s[0] = "pon";
    s[1] = "pon";
    s[2] = "hon";
    s[3] = "bon";
    s[4] = "hon";
    s[5] = "hon";
    s[6] = "pon";
    s[7] = "hon";
    s[8] = "pon";
    s[9] = "hon";
    cout << s[n%10] << "\n";
    return 0;
}