use warnings;
use strict;

my $table1 = <<TABLE;
ID value
Aa 22
Bb 28
Cc 32
Dd 50
TABLE
my $table2 = <<TABLE;
ID value
Aa 34
Cc 112
Dd 77
Ee 89
Kk 124
TABLE
my $table3 = <<TABLE;
ID value
Bb 75
Cc 91
Dd 132
TABLE
my $table4 = <<TABLE;
ID value
Aa 66
Cc 94
Ee 213
Gg 250
TABLE

my %values;
my $tableIndex = 0;

for my $inFileVar (\$table1, \$table2, \$table3, \$table4) {
    open my $inFile, '<', $inFileVar or die "Can't open $inFileVar: $!\n";
    
    while (<$inFile>) {
        chomp;
        
        my ($id, $value) = split;
        
        next if $id eq 'ID';
        $values{$id}[$tableIndex] = $value;
    }
    
    ++$tableIndex;
}

for my $id (sort keys %values) {
    print "$id";
    print ' ', $values{$id}[$_] || 0 for 0 .. $tableIndex - 1;
    print "\n";
}