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perl -e 'my $x=q|v09.11-e020|;$x =~ m/^v[0-9][0-9]\.[0-9][0-9]-[a-z][ +0-9][0-9][0-9]/ and print " match\n"' #Prints ' match'
m/^v\d{2}\.\d{2}-[a-z]\d{3}/
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