#!/bin/bash

parent=$1
hasdirs=true

while [ $hasdirs == true ]
do
   for child in $(ls $parent)
   do
      if [ -d $parent/$child ]
      then
         mv $parent/$child/* $parent/
         rmdir $parent/$child 2> /dev/null
      fi
   done

   hasdirs=false

   for child in $(ls $parent)
   do
      if [ -d $parent/$child ]
      then
         hasdirs=true
         break
      fi
   done
done