function main(input) {
  const n = parseInt(input[0]);
  switch(n%10){
    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;
    case 3:
      console.log("bon");
      break;
  }
}
main(require('fs').readFileSync('/dev/stdin', 'utf8').trim().split("\n"));