c-p-c c-pop ccccc ccoyo cnnnn co-co co-np co-op cocc- cocco cocon conco conny cono- conon conop conoy coony coopy coppo coppy copyc cyno- n-p-n nnooo no-no no-op nonno nonny nonop nonpc noppy noyon nycon occoy ocopy onco- onoon onpop onyon ooooo opcon oppon opypy p-n-p po-on po-po pocno pocop poncy ponyo poopo poopy popco popon popop poppo poppy pycn- pynn- pynon pypyn yo-yo yocon yopon