bbbb bbeb bbet bblb bbpr bebb bebe bebi beeb beel beep beer beet beil beir beit bele beli bell belp belt bere beri berr bert bete beti bett bibb bibe bibi bibl bieb biel bier biet bile bili bill bilt bipp birb bire biri birl birr birt bite bitt blbt bleb blee blei blet blip blir blit bpel bpti breb bree brei brel brep brer bret brie bril brit brlp brrr btbp btie btlp btrt bttb ebbr ebel eber ebit ebli eeee eele eete eiei eier eile eipr eire eitb eiti eitr el-b el-p elbe elbi elee eler elet elie elil elit elle elli elpe elpi elte epee eper epi- epie epil epip epit eple epll eppp eprb eprp epte erbb erbe ereb erei erel erer eret erie eril erit erle erli erll erpe erre ertl etbr etee etel eter etre ette etti i-be ibet ibie ible ibri ibtb ibtl ieet ieie iele iere ieri iett iiie iiii iiit iitr iitt ile- iler ilet ilie ilir ilit ill- ille illi illp illt ilpe ilpr ilre iper ipet ipie ipil ippr ipri irbe irbp iree irel irer iri- irie iril irip irlb irpe irre irri irte irti irtp itbe itel itep iter itet itie itil itll itri lblr lbrt leel leep leer leet leib leie leil leir leit lele leli lell lepe lepi lepp lept lere lerp lert lete leti lett libe libr lieb liel liep lier liet liii liir lilb lile lili lill lilt lip- lipb lipe lipi lipl lipp lire liri lirl lirp lirr lirt litb lite liti litl litr litt llet llll lppl lprp lptb lrrr ltbl ltee ltib lttr pbil pebl peel peep peer peet peil peip peir peit pel- pelb pele pell pelt pepe pepi per- pere peri perl perp perr pert pete peti petr pett pibb pibi piel piep pier piet piip pil- pile pili pill pilt pipe pipi pipp pire piri pirl pirr pite piti pitr pitt plbr ple- pleb plee plei plet plib plie plip plit plpp plri pltt pper ppib ppie pple ppli pppp pptt pre- preb pree prel prep pret pri- prie prii prle prlr prri prti prtp prtr ptbl pter rbbb rbbr rble rebb rebe reeb reel reep reet reii reil reir reit relb rele rell relp relt repe repi repl repp repr rept rere reri rert rete reti retr rett rib- ribe riel riep rier riet rile rill rilp ripe ripi ripl ripp ripr ript rire riri rite riti ritl ritt rlee rpet rpii rrle rrrr rtee rtei rtle rtlt rttp tbil tbit tbrb tbtp teel teer teet teie teil teip teir tel- tele teli tell telt tepe tepi tepp ter- tere teri terp terr tete teti tetr tett tibi tie- tiee tiei tiel tiep tier tiet tiit tile till tilr tilt tip- tipe tipi tipp tipt tirb tire tiri tirl tirr tite titi titp titt tlli tper tpir tppp tppr tpte tptp tptr tre- tree trei tret tri- trib trie tril trip trit trpe trpp trte trtr ttbb tter tttt