c-p-c c-pop ccccc cloop cloot co-co co-op cocc- cocco cocol cocto coll- collo colo- colop colp- colpo coolo coopt coppo copto cott- cotto cpctc l-pop loco- lollo lolol loopt lotto ltcol ocllo octo- octol ooooo oploo oplot oppol opto- optot optto otolo ototo pctct ploop ploot plopp plott po-po pocol pocop polco pollo polop poopo popco popop poppo potco potoc potoo potop potto t-pop t-top tocco toco- tollo toloo toolt toplo topo- topol topot toppo topto toto- totoo totop ttttt