cccc cchr ccnc ccnr ccoc ccrc chch chnc chno chnr choc choh chon choo chor chrc chrn chro chrr cnco cnoh cnrc cnrr coch coco cohn coho con- conc conn cono cooh coon cor- corc corn coro corr crcc crcr croc croh cron croo cror hccc hcch hhhh hoch hocn hocr hohn hoho hono hoon hoor horc horn horo horr hron hrrc nccc nccn nccr nchc ncnc ncoc ncor ncrc nhcc nhnn nhon nhrc nnnn noch noco nohn noho non- nonn nono noo- noon nooo noor nor- norc norn noro norr nroc nron nrrc occc occn ocon ocro ocrr ohcc ohho ohno ohoh ohrn onc- onco onno onon onor oocr ooho oooh oooo orch orco ornc orno oro- oron oror orro rccc rcnr rcon rhoc rhoh rhon rnco rocc roch roco rohn rohr ronc rono roon roor rorc roro rrrr