cccc ccee ccrc ccre ccrt cctc cctt cec- cece cect ceec cer- cerc cere cert cery cet- cete crcc crce crcr cre- crec cree cret crrt crtc cry- ctec ctrc cyc- cycc cyre cyrt cyt- cyte cyy- cyyc eccc ecce ecct ecrc ecrr ect- ectc eeee eerc eery eetc eete ercc erce erec erer eret errc erre eryc erye etcc etec etee eter etre ette etty eyec eyer eyet eyey eyre eyry eyte eyyr rccc rcet rctc rcyc recc rece recr rect recy reet rere rert rery rete retr rett rety reye rrrr rtcc rtce rtee ryet rytt ryyt tccc tctc tecr tect teec teer teet ter- terc tere terr tery tete tetr tett teye teyr trcc tre- trec tree tret trey trtc trte trtr try- trye tter tttt tyce tyee tyer tyet tyr- tyre tyrr tyte tytt tyty yccc ycee yctc yeer yeet yere yerr yert yery yete yett yeye yeyr ytre yyyy