Set "$set_group_size" to the size you want the chunks to be. 
use Data::Dumper;
my $set_group_size = 2;
my @list = 1..5;
print Dumper ([ sumList($set_group_size,@list) ]);

sub sumList {
    my @sumlist;
    my $size = shift;    
    while ( @_ ) {
        my @current = splice @_, 0, $size-1;
        foreach my $item (@_) {
            push ( @sumlist, [@current,$item] );
        }
        unshift (@_, @current[1..$#current]);
    }
    return @sumlist;
}

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In reply to Re: Combinatorics by jryan
in thread Combinatorics by ezekiel

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