void main() {
  auto n = ri;
  n %= 10;
  switch(n) {
    case 2, 4, 5, 7, 9:
      writeln("hon");
      break;
    case 0, 1, 6, 8:
      writeln("pon");
      break;
    case 3:
      writeln("bon");
      break;
    default: assert(0);
  }
}

// ===================================

import std.stdio;
import std.string;
import std.functional;
import std.algorithm;
import std.range;
import std.traits;
import std.math;
import std.container;
import std.bigint;
import std.numeric;
import std.conv;
import std.typecons;
import std.uni;
import std.ascii;
import std.bitmanip;
import core.bitop;

T readAs(T)() if (isBasicType!T) {
  return readln.chomp.to!T;
}
T readAs(T)() if (isArray!T) {
  return readln.split.to!T;
}

T[][] readMatrix(T)(uint height, uint width) if (!isSomeChar!T) {
  auto res = new T[][](height, width);
  foreach(i; 0..height) {
    res[i] = readAs!(T[]);
  }
  return res;
}

T[][] readMatrix(T)(uint height, uint width) if (isSomeChar!T) {
  auto res = new T[][](height, width);
  foreach(i; 0..height) {
    auto s = rs;
    foreach(j; 0..width) res[i][j] = s[j].to!T;
  }
  return res;
}

int ri() {
  return readAs!int;
}

long rl() {
  return readAs!long;
}

double rd() {
  return readAs!double;
}

string rs() {
  return readln.chomp;
}