#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11124289
use warnings;
use Path::Tiny;

my $dirname = 'Filer';
my $outputfile = path('output.second.column');
$outputfile->spew(''); # empty file

for my $file ( path($dirname)->children( qr/\.txt\z/ ) )
  {
  $outputfile->append( map { (split /\t|\n/)[1] . "\n"} $file->lines );
  }

# following for debug only :)
system 'more Filer/* output.second.column | cat';
# because 'more' shows filename and contents when piped