c-cor c-p-c c-pop ccccc cnnnn co-co co-np co-op cocc- cocco cocon conco concr cono- conon conop conor coppo copr- copro corno coro- coron corop croco croon croop cropc cropo n-p-n nnooo no-no no-op nonno nonop nonpc norco noroc noron norro ocorn onco- onoon onorn onpop ooooo opcon oppon orcon orcop ornon oroco orono p-n-p po-on po-po pocno pocop ponor poopo popco popon popop poppo porcn porco porn- porno poro- poron porro proor prop- propn propp propr r-co- ro-ro rocco rocor ronco ronno rprop