c-one ccccc ceco- cecon ceddo ceded ceede ceedo ceene cence ceno- cenon ceoce cnnnn co-co co-ed cocc- cocce cocco coceo cocon codco codde codec coded coden codo codon coen- coend conco conde condo coned conne cono- conon coode cooed cooee coone d-con dconn ddddd decon dedde dedee deden dedon deece deede deene dende denee denne denno denon do-do doced dodec dodon dodoo don-e donce donde dondo donee donen donne donon dooce doodo doone e-dee e-one eccen econo edcon eddoe edeo- eeden eeeee eence endec ended enden endo- endon eneco ennde enode enone ncode necco nedde neded neden nedon neece neede nende nenno neocd neode nnooo no-do no-no noded noend nonce nonde nondo nonne nonno noone oceno ocoee odeco odeen odeon odone oeco- oeno- oenoe oncee onco- onend onene oneno oneon onne- onnen onond onone onoon oonde ooooo