const main = stdin => {
  const N = stdin.trim()
  switch (N[N.length - 1]) {
    case '2':
    case '4':
    case '5':
    case '7':
    case '9':
      console.log('hon')
      break;
    case '0':
    case '1':
    case '6':
    case '8':
      console.log('pon')
      break;
    default:
      console.log('bon')
      break;
  }
}

// 標準入力
main(require("fs").readFileSync("/dev/stdin", "utf8"))
