-ene bbbb bbch bbeb bbfc bbfn bbrc bcbc bccc bcec bcer bcfc bche bebb bebe bech beeb beef been beer befe beff behn behr bene benn berc bere bern berr bhcc bher bhff bner bnrr brcb brce breb brec bree bref bren brer brfc brrr cbbc cbcc cbce cbcn cbcr cbec cbee cbef cber cbfb cbfc cbre cbrh cbrn ccbc ccbn cccb cccc cccf ccee ccfc ccff cche cchr ccnb ccnc ccne ccnf ccnr ccrc ccre ccrf cec- cece ceeb ceec cef- cefc cefn cen- cene cer- cerc cere cerf cern cfbc cfbn cfbr cfcb cfcf cfcn cffb cffr cfnb cfnr cfrb cfre cfrn chce chch cheb chec chee chef cheh chen cher chfc chfr chnb chnc chnr chrb chrc chrf chrn chrr cnbc cnrc cnrr crbc crcc crce crcr cre- creb crec cree creh cren crfc crne ebbc ebbr ebcc eben eber ebfc ecbc ecbe eccb eccc ecce ecef ecfc ecfr eche ecne ecrc ecrf ecrr eeee eefe eefn eerc efbr efen ehcc eheh ehen eher ehre enb- enbn enbr ence ench enee ener enfb ennc enne erbb erbe ercc erce erch ereb erec eren erer erfc erhc erne errc erre fccf fcch fece fech feeb feen feer fefc fefe feff fehr fene fenn ferb ferc fere fern ferr ffcc ffee ffff ffrr frbc frcc frcn free fren frfc hbfc hcbc hccb hccc hcch hcfc hebb hebe hebr hech heeb heef heer hefe hehe hehn hene henh henn herb herc here hern herr hfce hhhh hnce hree hrfc hrrc nbbc nbcc nber nbfc ncbc nccc nccf nccn nccr ncec ncee ncef ncen ncer ncfc ncfe nchc ncnc ncrc ncre nebb nebe nebn nebr necc nece nech necr neeb neef neen neer nefe neff nefh nehe nene nenh nerc nere nerf nerr nfer nfff nhcc nheb nhnn nhrc nnnn nren nrfc nrrc rbbb rbbr rcbc rccb rccc rcfc rchb rcnr rebb rebe recc rece rech recr reeb reef reen refe reff refn refr rehb rehe rehn rene renn rere rfef rffc rhce rheb rhee rhen rnbr rrfc rrrr