c-one c-p-c c-pop ccccc ceco- cecon ceene cence ceno- cenon cenpn ceoce cepno ceppo cnnnn co-co co-np co-op cocc- cocce cocco coceo cocon coen- coepe conco conne cono- conon conop cooee coone coope copce copec copen coppe coppo e-one eccen econo eeeee eence eepee eneco enone enope enpo epeen epene epone n-p-n necco neece nenno neope neppe nnooo no-no no-op nonce nonne nonno nonop nonpc noone nopep noppe oceno ocoee oeco- oeno- oenoe oeppo oncee onco- onene oneno oneon oneop onne- onnen onone onoon onpop ooooo opcon opepe opone oppon p-n-p pecco pecon peece peene pence penco pene- penne penon peone pepco pepee pepon peppe pneo- po-on po-po pocno pocop ponce ponne poope poopo popco popon popop poppe poppo