use strict;
use warnings;
use List::MoreUtils qw(pairwise);
my @AoA_first = (
    [qw(a b c)],
    [qw(d e f)],
);
my @AoA_second = (
    [qw(1 2 3)],
    [qw(4 5 6)],
);
for my $i ( 0 .. $#AoA_first ) {
    my $row_first = $AoA_first[$i];
    my $row_second = $AoA_second[$i];
    open my $TEMP, '>', "TMPFILES/$i.tmpfile"
        or die "Cannot open $i.tmpfile";
    print {$TEMP} pairwise {"$a\t$b\n"} @$row_first, @$row_second;
    close $TEMP;
}