bbbb bbci bbeb bbfc bblb bbrc bcbc bccc bcci bccl bcec bcer bcfc bcie bebb bebe bebi beci beeb beef beel beer befe beff beic beil beir bele beli bell berc bere beri berr bffl bibb bibe bibi bibl bicc bice bici bieb bief biel bier biff bifi bile bili bill birb bire biri birl birr bleb blee blei blfc blic blir blrc brcb brce breb brec bree bref brei brel brer brfc bric brie bril brrr cbbc cbcc cbce cbcl cbcr cbec cbee cbef cber cbfb cbfc cbir cblb cblc cbre cbrl ccbc cccb cccc cccf ccci cccl ccee ccel ccfc ccff ccfi ccfl ccic ccii ccil ccir cclc ccli ccrc ccre ccrf ccri ccrl cec- cece ceci ceeb ceec ceel cef- cefc ceil cel- celc cele celf celi cell cer- cerc cere cerf ceri cerl cfbc cfbr cfcb cfcf cfcl cffb cffr cfrb cfre cibc cibe cibi cicc cici cicr ciee ciel cier cife ciff cifl ciii cili cill cirb circ cire ciri cirl cirr clec clee clef clei cler clib clic clif clii clir clri crbc crcc crce crcr cre- creb crec cree crei crfc crfl crib cric crie crif crlf e-cl ebbc ebbr ebcc ebel eber ebfc ebic ebli ecbc ecbe eccb eccc ecce ecci eccl ecef ecfc ecfr ecib ecil ecrc ecrf ecri ecrl ecrr eeee eefe eefl eele eerc efbr effi efic efil eiec eiei eier eile eire el-b elbe elbi elcb elce elec elee elef eler elfc elfe elfi elic elie elif elil elle elli erbb erbe ercc erce ereb erec erei erel erer erfc eric erie eril erle erli erll errc erre fble fccf fcic fcii fece feeb feel feer fefc fefe feff fefi feie feil feir fele felf feli fell ferb ferc fere ferr ffcc ffee ffff ffii ffrr fibe ficc fice fiec fief fiel fier fifc fife fiff fifi fiii fiil file fili fill fire flcl flee fler flic flii frbc frcc free frei frfc frib fric frie fril i-be ibec ibfi ibie ible ibrc ibri icbc iccb iccc iccf icci iccl iccr icec icee icef icel icer icfb icle icll iclr icrc icre icrf icrr iecc ieie iele iere ieri ifbb ifel ifer ific ifil ifrb ifrf ifri iiie iiii iirc ilbc ilce ile- ilec iler ilic ilie ilir ill- ille illi ilre irbe ircc iree irel irer irfe iri- iric irie iril irlb irrc irre irri lbcc lblr lcbc lccc lcce lcer lcfc lcfr lcrl lece leef leel leer lefe leff leib leic leie leif leil leir lele leli lell lerc lere lfcc libc libe libr lice licr lieb lief liel lier life liff lifl liii liir lilb lile lili lill lirc lire liri lirl lirr llcc llef lllc llll lrfc lric lrif lrrc lrrr rbbb rbbr rbcl rble rcbc rccb rccc rcfc rcic rcle rebb rebe recc rece reci recr reeb reef reel refe reff refi refl refr reif reii reil reir relb rele rell rere reri rfef rffc rffl rfic rib- ribe ricc rice rief riel rier rife riff riif rile rill rire riri rlee rlef rlif rrfc rrif rrle rrrr