]> G eyefloss 2006.01.03 cluster0 I have nothing to do cluster1 cluster2 cluster3 and I am doing it. head0 _ _ o0 / ~ / head1 o0 / ~ / _ _ head0->head1 head2 / ~ / _ _ o0 head1->head2 head3 / ~ / _ _ o0 head2->head3