You're in luck, if P::RD doesn't work out. This language isn't recursive, so it can be matched easily with a regex. (If it were recursive, it'd be a little harder, but still doable.)

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Jeff[japhy]Pinyan: Perl, regex, and perl hacker.
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;