#include <bits/stdc++.h>
int main() {
  char N[4];
  gets(N);
  if (N[0] == '2' || N[0] == '4' || N[0] == '5' || N[0] == '7' || N[0] == '9') {
    printf("hon");
  } else if (N[0] == '0' || N[0] == '1' || N[0] == '6' || N[0] == '8') {
    printf("pon");
  } else {
    printf("bon");
  }
  return 0;
}
