-hou cccc cccu ccee cche cchr ccoc ccrc ccre ccuc cec- cece ceco ceec ceor ceou cer- cerc cere cero chce chch chec chee cheh cher cheu choc choh choo chor chou chrc chro chrr chur coce coch coco cocu coho cooh cor- corc core coro corr coue cour crcc crce crcr cre- crec cree creh creo creu croc croe croh croo cror crue cucc cuce cuer cure curo curr eccc ecce ecco eche echo eco- ecou ecrc ecrr ecru eeee eeoc eerc eero ehcc eheh eher eheu ehre eore ercc erce erch erec erer erhc erhu eroc eroe eroo errc erre erro eruc eruh erur euch euer eur- eurc eure euro hccc hcch hech heer hehe heho heor heou herc here hero herr heru heue heur hhhh hoce hoch hocr hoer hohe hoho hooe hoor horc hore horo horr houe hour hree hrrc huch hucu huer huhu huor hure huro hurr huru o-eo occc oce ocee oche ocre ocro ocrr ocur oec- oecc oeec oere ohcc ohee oher ohho ohoh ohre oocr ooer ooho oooh oooo oore orce orch orco ore- orec oreh oreo orer orhe oro- oroe oror orro oucc ouch ouer our- oure ouro ouu- rccc recc rece rech recr recu rehe reou rere rero reru reue reuu rhce rhee rheo rhoc rhoh rhue rocc roce roch roco roer rohe rohr rohu roor rorc rore roro roru roue rouh rrrr ruce ruch ruer ruhe ruhh ruhr rurc rure ruro ruru uche ucho ucrc uher uhoh uhuh uocc uor- uore urch ure- ureh urho uro- uroo urre urrh urur uuoc uuuu