#!/bin/sh
#The real sh not with bash extensions
#for testing use dash as interpreter because sh is often simlinked to bash
bottles(){
    if test $1 -eq 1
        then echo 1 bottle
    elif test $1 -eq 0
        then echo no more bottles
    else echo $1 bottles
    fi
}
i=99
until test $i -eq 0
    do echo `bottles $i` of beer standing on the wall, `bottles $i` of beer.
    i=$(($i-1))
    echo Take one down and pass it around, `bottles $i` of beer on the wall.
    echo
done
echo No more bottles of beer standing on the wall, `bottles 0` of beer.
echo Go to the store and buy some more, `bottles 99` of beer on the wall.