This seems to work:

#!/usr/bin/perl
use strict;
use warnings;



my @header = qw/ chr fivep threep strand /;

my %output;

@ARGV = glob 'file*.tab';

while ( <> ) {
    tr/\t// == 8 or die "_ERROR_ not 9 columns: $_";

    my ( $key, $val ) = /^ ( [^\t]+ \t [^\t]+ \t [^\t]+ \t [^\t]+ ) \t
+ [^\t]+ \t [^\t]+ \t ( [^\t]+ ) /x;

    $output{ $key }[ @header - 4 ] = $val || 0;

    if ( eof ) {
        push @header, $ARGV;
        }
    }
        
print join( "\t", @header ), "\n";

for my $key ( keys %output ) {
    my $new = $key =~ s/ \t \K ( [^\t]+ ) \z / $1 eq '0' ? '+' : '-' /
+rex;

    $output{ $key }[ $_ ] //= 0 for 0 .. $#header - 4;

    print join( "\t", $new, @{ $output{ $key } } ), "\n";
    }
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