#!/bin/bash 

set -eu

num=$1
minlength=1


alphabets=(bcdfglmnprstvz aeiou)
numalpha=${#alphabets[@]}
v=$num
st=
length=0

idx=$(((numalpha - 1) % numalpha))
while ! { [ "$v" -eq 0 ] && [ $idx -eq $(((numalpha - 1) % numalpha)) ] && [ $length -ge $minlength ] ; }
do
            al=${alphabets[idx]}
            r=$((v % ${#al}))
            v=$((v / ${#al}))
            st="${al:$r:1}$st"

            idx=$(((idx + numalpha - 1) % numalpha))
            length=$((length + 1))
done

echo "$st"