Older versions of Perl (even in the Perl 5 distro) required seeing @foo or $foo[...] before seeing "@foo". It's a weird thing, indeed. Newer Perls aren't so bitchy.

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Jeff[japhy]Pinyan: Perl, regex, and perl hacker, who'd like a (from-home) job
s++=END;++y(;-P)}y js++=;shajsj<++y(p-q)}?print:??;