This is perl, v5.10.1 (*) built for x86_64-linux-thread-multi
(with 1 registered patch, see perl -V for more detail)

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This is perl 5, version 12, subversion 2 (v5.12.2) built for x86_64-linux-ld

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This is perl 5, version 13, subversion 4 (v5.13.4) built for x86_64-linux-ld