cccc cccl cccp cclc ccnc ccnp ccoc ccpl ccpn ccpp cctc cctl cctt clon cloo clop clot clpp cltc cnco cncp cntc coco cocp coct col- coll coln colo colp colt con- conc conn cono cont cool coon coop coot copo copp copt cotc cotn coto cott cplc cpnt cptp ctcp ctol ctot ctpo ctpp cttn lccc lcpc lcpl lctl lcto llcc lllc llll lloc lloo lntc locc locn loco loll lolo lono lont looc lool loon loop loot lopp lotl loto lott lppl ltcc ltnt lttc nccc nccn nccp ncct nclc ncln ncnc ncoc ncpc nctc nlcc nlpc nnnn nnot nntn nocl noco noct noll nolo nolp nolt non- nonn nono nont noo- nool noon nooo noop noot not- noto nott npcc nppc nppl nptc nptn ntcc ntop ntpc ntto occc occn occt oclc ocon ocpp oct- octo olcc ollo olon olot olpc onc- onco onct onno onon onpt ont- ontc onto oolo oont oooo ootp opo- opon oppo optn opto otcl oto- oton otoo otpp otto pccc pccl pcll pclo pcnt pcpn pcpp plcc plnt ploc plon ploo plop plot plpp pltt pnln pnnl pnon pnot pnpo pnpp pntl poco poll polo polt ponc pono ponp pont pool poon poop poot pop- popc popo popp popt potc poto pott ppcc pplo pppn pppo pppp pptn pptt ptcc ptcl ptol ptop pttc tccc tcnn tcon tcpo tctc tlco tlon tncc toco tol- toll tolo tolt tonn tono tool toon toot top- topo topp topt totc toto tott tpcp tpol tpon tppp tptp ttcn ttcp tton ttop tttt