$i = substr(argv[1], -1)
  switch ($i) {
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:  
        echo "hon";
        break;
    case 0:
    case 1:
    case 6:
    case 8:  
        echo "pon";
        break;

    case 3:
        echo "bon";