-hou cccc cccf cccu ccfc ccff cchr ccoc ccrc ccrf ccuc cfcf cfco cffr cfor chch chfc chfr choc choh choo chor chou chrc chrf chro chrr chur coch coco cocu cofc coff coho coof cooh cor- corc corf coro corr cour crcc crcr crfc croc croh croo cror cucc cufc cuff cufo curf curo curr fccf fcch ffcc ffff ffrr foch foco fofo fohr foof for- foro forr four frcc frfc froh frou fuc- fufc fuff fufu fuor fur- furo furr hccc hcch hcfc hhhh hhof hoch hocr hoff hofu hoho hoof hoor horc horo horr houf hour hrfc hrrc huch hucu hufc huff hufu huhu huor huro hurr huru occc ocro ocrr ocur ofcr off- offc offh offo offr offu ofor ohcc ohho ohoh oocr ooff ooho oooh oooo orch orco orff orfu oro- orof oror orro oucc ouch oufc ouff our- ouro ouu- rccc rcfc rffc rhoc rhoh rocc roch roco rofc roff rofo rohr rohu roof roor rorc roro roru rouf rouh rrfc rrrr ruch rufc ruff rufo ruhh ruhr rurc ruro ruru ucho ucrc ufcu uhoh uhuh uocc uofo uor- urch urff urho uro- uroo urrh urur uuoc uuuu