cccc cchr ccoc ccrc chch choc choh chok choo chor chrc chro chrr ckch ckck ckco ckoc ckoo ckor ckrc coch cock coco coho cok- coko cooh cook cor- corc cork coro corr crcc crcr crkc croc croh crok croo cror hccc hcch hhhh hkcc hoch hock hocr hoho hoko hook hoor horc hork horo horr hrrc kccc kcck kccr kchh kchk kcho kchr kckc kckk kcko kckr kcoh kcor kcrc kcrh kcro kcrr khcc khch khck khhk khho khkk khkr khoc khok khor khrk khro khrr kkch kkck kkco kkcr kkhh kkhk kkhr kkkk kkoh kkoo kkor kkrc kkrh kkrk kkro kkrr koch kock kohh koho kohr kokc kokh kokk koko kokr kooc kook kooo koor korc kork koro korr krcc krch krco krhc krkc krkh krkk krko krkr kroc kroh krok kroo kror krrc krrk krro krrr occc ocro ocrr ohcc ohho ohoh ohok okko okok okor okro oocr ooho oooh oooo orch orco orko oro- orok oror orro rccc rhoc rhoh rocc roch rock roco rohr rokh rokk roko rokr rook roor rorc rork roro rrrr