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@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."
/s/until@c=(@b=(++$n,bottle.$&,of,beer),on,the,wall),s/^/Take one down + and pass it around, @c. ... /,/, 99.* /;print$'."Go to the store and buy some more$&"