$ perl -Mstrict -Mwarnings -E '
my $line = q{xxx 1 12:34:56 xxx/xxxxx xxx xxxx xxx xxx};
my $line_re = qr{^(\w+) (\d+) (\d+):(\d+):(\d+) (.*)};
my ($month, $day, $hour, $min, $sec, $rest) = $line =~ m{$line_re};
say $hour;
'
12