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c:\@Work\Perl>perl -wMstrict -le "my $y = '2017-01-29 11:30:07.370'; ... A: x '2017' y '2017-01-29 11:30:07.370' B: x '01-29-2017 11:30' y '2017-01-29 11:30:07.370' C: x '1' y '01-29-2017 11:30'