c-cor c-p-c c-pop ccccc cnnnn co-co co-np co-op cocc- cocco cocon cocur conco concr connu cono- conon conop conor coppo copr- copro copur corno cornu coro- coron corop corun couco couru croco croon croop cropc cropo croun croup cruor cunco cuoco cupon cupr- cupro curno curro curup n-p-n nnooo no-no no-op non-u nonno nonop nonpc noonu nopun norco noroc noron norro norun nu-nu nucor nunon nunun nuoro nupur nurun occur ocorn onco- onoon onorn onour onpop ooooo opcon oppon orcon orcop ornon oroco orono oruro ouoro ourno p-n-p po-on po-po pocno pocop ponnu ponor ponup poopo popco popon popop poppo popup porcn porco porcu porn- porno poro- poron porro porur proor prop- propn propp propr prun- pruno punon puppo puro- r-co- ro-ro rocco rocor rocou ronco ronno rprop runcu runo- runon runup u-con u-pop uconn uncon uncor uncup unnun unnur unoor unorn unrun unurn upnor uppon uprun urour urucu uuuuu