cccc cccl ccee ccel cclc ccrc ccre ccrl ccrt cctc cctl cctt cec- cece cect ceec ceel cel- celc cele cell celt cer- cerc cere cerl cert cet- cete clec clee cler clet cltc crcc crce crcr cre- crec cree cret crrt crtc crtl ctec ctle ctrc ctrl e-cl eccc ecce eccl ecct eclt ecrc ecrl ecrr ect- ectc eeee eele eerc eetc eete elce elec elee eler elet elle elte ercc erce erec erel erer eret erle erll errc erre ertl etcc etec etee etel eter etre ette lccc lcce lcer lcrl lctl lece lect leel leer leet lele lell lerc lere lert lete lett llcc llet lllc llll lrrc lrrr ltcc ltee lttc lttr rccc rcet rcle rctc recc rece recr rect reel reet rele rell relt rere rert rete retr rett rlee rrle rrrr rtcc rtce rtee rtle rtlt tccc tctc tecl tecr tect teec teel teer teet tel- telc tele tell telt ter- terc tere terr tete tetr tett trcc trcl tre- trec tree tret trtc trte trtr tter tttt