@a=(++$a." bottle$& of beer",on,the,wall),s/^/
Take one down and pass it around, @a.

@a, $a[0]./,/s/until/
99/;print"99$'
Go to the store and buy some more, @a."

##</code><code>##

/s/until@c=(@b=(++$n,bottle.$&,of,beer),on,the,wall),s/^/Take one down and pass it around, @c.

@c, @b.
/,/, 99.*

/;print$'."Go to the store and buy some more$&"