#include <stdio.h>

int main() {
    int n;
    scanf("%d", &n);
    
    n = n % 10;

    if (n == 2 || n == 4 || n == 5 || n == 7 || n == 9)
        printf("%s", "hon");
    else if (n == 0 || n == 1 || n == 6 || n == 8)
        printf("%s", "pon");   
    else
        printf("%s", "bon");

    return 0;
}