import scala.io.StdIn._
object Main {
  def main(args:Array[String]) {
    val N = readLine().toInt

    if(N % 10 == 2 || N % 10 == 4 || N % 10 == 5 || N % 10 == 7 || N % 10 == 9)
      println("hon")
    else if(N % 10 == 0 || N % 10 == 1 || N % 10 == 6 || N % 10 == 8)
      println("pon")
    else
      println("bon")

  }
}
