cccc cccu cccv ccee ccgc ccgt ccoc ccrc ccre ccrg ccrt cctc cctt cctv ccuc ccut ccvo cec- cece ceco cect ceec cege cego ceor ceou cer- cerc cere cero cert cet- cete ceto cetv cevo cgcc cgcg cger cgro cgtu coce coco coct cocu cogo coot cor- corc core corg coro corr cort cotc cote coto cott cotu coue cour cout cove covo crcc crce crcr cre- crec cree creg creo cret creu croc croe croo cror crot crrt crtc crtv crue crug crut ctec ctge ctgu ctor ctot ctrc ctvo ctvt cucc cuce cuer cure curo curr curt cut- cutc cute cuto cutt cutv cuve cvcc cver cvet cvrg cvrr cvte eccc ecce ecco ecct eco- ecog ecot ecou ecrc ecrr ecru ecrv ect- ectc ecto ectv eeee eeoc eerc eerg eero eetc eete eetu egcc egcg egcr egec egee eger egge eggo ego- egor egot egov egre egte eore eotc eoto ercc erce erec erer eret erev erg- ergg ergo eroc eroe eroo errc erre erro ertu eruc erur eruv erve etcc etco etec etee eter etoe etre etro ette etto ettu etvo euer euge eur- eurc eure euro eurt ever evet evoe evoo evre gc-c gccc gcet gcov gcrg gctc gece geer geet gege gegg gego geo- geog gere gero gert geru gete getg geto gett geue geve gevo gggg goce gocr goer gogo goog goor goot gore gorg goro gorr gort gote goto gott gotv gou- goug gour gout gove govt grcc grce grec gree greg gret greu grev groc grog groo gror grot grou grov grrr grtc grue grug grur grut grve gtco gtcr gtoe guer guge gugg gugu gure gurg guro gurr gurt guru gute guto gutt gutu gvtv gvvv o-eo occc occt oce ocee ocet ocre ocro ocrr oct- octe octo ocur oec- oecc oeec oere ogee oger ogge ogog ogou ogre ogro oocr ooer oooo oore oort orce orco ore- orec oreg oreo orer orge orgo oro- oroe oror orot orro ortc orte orto orve orvr otee oter oto- otoe otog otoo otor otov otre otro otte otto ottu otur oucc ouer ouge our- oure ouro ourt out- oute outo ouu- ovee over ovet ovo- ovoo ovot ovre rccc rcet rcgc rcrg rctc rctg rctv rcuv rcvr recc rece recr rect recu reet reev rege rego regr regt regu reog reot reou rere rerg rero rert reru rete reto retr rett reue reut reuu reve revo rgtr rocc roce roco roeg roer roet roev roge rogg rogo roog roor root rorc rore roro rort roru rotc rote rotg roto rotr rott roue rout rove rovo rrrr rtcc rtce rtcg rtee rtve ruce ruct ruer ruet ruge rugg rurc rure ruro ruru rute ruto rutt rutu ruve ruvu rv-c rver tccc tccu tcov tctc teco tecr tect teec teer teet teev tegg tego tegt tegu teor ter- terc tere tero terr teru tete teto tetr tett tetu teut tgcc tgtc toce toco toee toer toet toge togo togr togt toor toot torc tore torg toro torr tort toru torv totc tote toto totr tott toug tour tout touv tove tovo trcc tre- trec tree treg treo tret treu trev trge troc troe trog troo trot trou trtc trte trtr truc true trug trut truu tteo tter ttoe tttt tucc tuco tuer tuet tugg tugu tuor turc ture turg turo turr turt turu tute tuto tutt tutu tuuo tver tvgc tvro tvrr tvtv ucrc uctv ucut ugcc ugcg ugeo uggo uggt ugro ugur uguu uocc uor- uore uovo ure- uret urge urgu uro- uroo urre urte urur urut urve utec uter utor utto uttu utug uuoc uuuu uv-c uver uvvu vcug vecc veer veet vege veor ver- vere vero vert vete veto vetr veur veve vevo vgcc voce voer voet voeu voge vogt vogu vooc voog voor voot vor- vore voro vort voru vote voto voue vour vout vreo vret vroc vrot vrto vtec vuco vugg vugo vurg vurt vutv vver vvog vvvv