#!/usr/bin/perl
use strict;
use warnings;
my $file = $ARGV[0] or die "Usage: $0 <input_file>";
open(my $fh, '<', $file) or die "Unable to open '$file' for reading: $!";
while (<$fh>) {
    next if /^(?:\s|[:cntrl:])/ || /^$/;
    s/^\S+\s//;
    print;
}