-ene bbbb bbeb bbpr bbrc bcbc bcbp bccc bcec bcer bcpp bebb bebe beck beeb beek been beep beer beke bene benk benn berc bere berk bern berr bkpr bner bnpp bnrr bpcp bprc brcb brce breb brec bree brek bren brep brer brkb brrr cbbc cbcc cbce cbcn cbcp cbcr cbec cbee cber cbkn cbkr cbpc cbpp cbre cbrn ccbc ccbn cccb cccc cccp ccee ccnb ccnc ccne ccnp ccnr ccpe ccpn ccpp ccpr ccrc ccre ccrp cebp cec- cece cecp ceeb ceec ceke cen- cene cepc cepe cepp cepr cer- cerc cere cern cerp ckbc ckbe ckck cken cker cknb cknc ckpc ckpr ckrc cnbc cnbp cncp cnep cnrc cnrr cpbc cpce cpeb cpep cper cpnb cpre crbc crcc crce crcr cre- creb crec cree cren crep crkc crkp crne crpc ebbc ebbr ebcc eben eber ecbc ecbe eccb eccc ecce ecne ecpp ecrc ecrr eeee eeke eerc ekeb ekek eken eker ekne ekpe enb- enbn enbr ence enee ener enke enkr ennc enne enp- epcc epec epee epen eper eppc eppp eprb eprp erbb erbe ercc erce ercp ereb erec eren erer erke erne erpe errc erre kbbb kbbc kbbe kbbk kbbr kbcb kbce kbck kbcr kbeb kbec kbee kbek kben kber kbkb kbkk kbkr kbnn kbnp kbnr kbpc kbpe kbpk kbpn kbpr kbrb kbrc kbre kbrk kbrn kcbc kcbk kcbr kccb kccc kcck kccr kceb kcec kcee kcep kckc kckk kckn kckr kcnb kcnp kcnr kcpc kcpn kcpr kcrc kcrn kcrp kcrr kebb kebc kebe kebn kebr keck kecr keek keen keep keer kekb kekc keke ken- kene kenk kenn kenr kep- kepc kepe kepn ker- kerb kerc kere kerk kern kerp kerr kkbb kkbe kkbn kkbr kkcb kkck kkcn kkcr kken kkkk kknb kkne kknn kkpc kkpk kkpn kkrb kkrc kkre kkrk kkrn kkrr knbb knbc knbe knbn knbr kncb knce knck kncn kncr kneb knec knee knek knen knep knkk knnb knnk knnr knpb knpc knpr knrb knrk kpbb kpbe kpbr kpcc kpcr kpek kper kpke kpkk kpkr kpnc kpne kpnp kppc kppk kppp kppr kprb kprc kpre kprk kprn kprp kprr krbb krbe krbk krbr krcb krcc krce krcn kreb krec kree krek kren krkc krke krkk krkn krkr krnb krne krnk krnn krnp krpr krrb krrc krre krrk krrn krrr nbbc nbcc nber nbpp ncbc nccc nccn nccp nccr ncec ncee ncen ncep ncer ncnc ncpc ncrc ncre ncrp nebb nebe nebn nebr necc nece neck necr neeb neen neep neer neke nene nepc nepe nepr nerc nere nerk nerr nnnn nnpr npcc nppc nren nrpc nrpn nrrc pbcc pbpk pcbc pccc pcce pcep pcer pcpb pcpn pcpp pcrc pcre pece peck pecr peec peek peen peep peer peke pekk pen- penc pene penk penn pepe per- perc pere perk pern perp perr pnec pnkp pnpp ppcc ppen pper pppn pppp pprc prbc prcc prcp pre- preb prec pree prek pren prep prnp rbbb rbbr rcbc rccb rccc rcep rcnr rebb rebe rebk recc rece reck recp recr reeb reek reen reep reke rene renk renn repe repp repr rere rnbr rncp rppn rrrr