-er -ol bbb bbc bbe bbk bbl bbo bbr bbx bcb bcc bce bck bcl bco bcr bcx be- beb bec bee bek bel beo ber bex bkb bkc bke bkk bkl bko bkr bkx blb blc ble blk bll blo blr blx bob boc boe bok bol boo bor box brb bre brk brl bro brr brx bxb bxl bxo bxx c-- cbb cbc cbe cbk cbl cbo cbr cbx ccb ccc cce cck ccl cco ccr ccx ce- ceb cec cee cek cel ceo cer cex ckb ckc cko ckx cl- clb clc cle clk cll clo clr clx co- cob coc coe cok col coo cor cox crb crc cre crk crl cro crr crx cxc cxk cxl cxo cxr cxx ebb ebc ebe ebk ebl ebo ebr ebx ec- ecb ecc ece eck ecl eco ecr ecx eeb eec eee eek eel eeo eer eex ekb ekc eke ekl eko ekr elb elc ele elk ell elo elr elx eo- eob eoc eoe eok eol eoo eor erb erc ere erk erl ero err ex- exc exe exl exo exr exx kbb kbc kbe kbk kbl kbo kbr kbx kcb kcc kce kck kcl kcr kcx ke- keb kec kee kek kel keo ker kex kkb kkc kke kkk kkl kkr kl- klb klc klo klr klx kob koc koe kok kol koo kor krc krk krl kro krr kxl kxo lbb lbc lbe lbk lbl lbo lbr lbx lcb lcc lce lck lcl lco lcr lcx leb lec lee lek lel leo ler lex lkb lkl lkr llb llc lle llk lll llo llr lob loc loe lok lol loo lor lox lrb lrc lrk lro lrr lxc lxo lxr lxx ob- obb obc obe obk obl obo obr obx oc- ocb occ ock ocl oco ocr ocx oeb oec oee oel oeo oer oex okb okc oke okk okl oko okr olb olc ole olk oll olo oo- oob ooc ook ool ooo oor oox or- orb orc ore ork orl oro orr orx ox- oxb oxc oxo oxx rbb rbc rbe rbk rbl rbo rbr rbx rcb rcc rce rcl rco rcr rcx re- reb rec ree rek rel reo rer rex rkb rkc rke rkk rko rlc rle rll rlo rlr rob roc roe rok rol roo ror rox rrb rrc rrk rrl rrr rxr xbc xbe xbl xbr xbx xcb xcl xcr xcx xee xel xer xex xkb xke xkl xlb xlr xoc xok xoo xor xox xrc xrx xxl xxo xxx

bbbb bbeb bblb bbox bbrc bcbc bccc bccl bcec bcer bcor bebb bebe bebo beck beeb beek beel beer beke beko bele belk bell belo beo- beok beor berc bere berk bero berr bleb blee blek bleo blkb blob bloc blok bloo blrc bobb bobe bobo boce bock boco boec boee boel boeo boer boke boko bole bolk boll bolo boob booc booe book bool boor boox bor- bore bork boro borr brcb brce breb brec bree brek brel breo brer brex brkb brob broc broe brok brol broo bror brox brrr c-bo cbbc cbcc cbce cbcl cbcr cbec cbee cber cbkl cbko cbkr cblb cblc cbol cbox cbre cbrl ccbc cccb cccc cccl ccee ccel cclc cclx ccob ccoc ccrc ccre ccrl ccxl cec- cece ceco ceeb ceec ceel ceke cel- celc cele cell celo ceol ceor cer- cerc cere cerl cero cexe ckbc ckbe ckbx ckck ckcl ckco ckcx cker ckob ckoc ckoo ckor ckrc clec clee clek cleo cler clob cloe clok cloo clor clox clro clxx cobb cobe cobo coce cock coco coel coex cok- coke coko col- colb cole colk coll colo coob cook cool cor- corb corc core cork corl coro corr coxe crbc crcc crce crcr cre- creb crec cree creo crex crkc crkl crob croc croe crok crol croo cror cxro cxxx e-cl ebbc ebbo ebbr ebcc ebel eber eboe ebol eboo ebor ebox ebro ecbc ecbe eccb eccc ecce eccl ecco ecko eco- ecol ecrc ecrl ecrr eeee eeke eele eeoc eerc eero ekco ekeb ekek eker el-b elbe elbo elcb elce elco elec elee elek eleo eler elex elke elko elle ello elok elro eole eolo eore eorl er-x erbb erbe ercc erce ereb erec erel erer erke erle erll erob eroc eroe erol eroo errc erre erro excl exco exec exel exer exo- exor exrx k-lo kbbb kbbc kbbe kbbk kbbl kbbo kbbr kbcb kbce kbck kbcl kbco kbcr kbeb kbec kbee kbek kbel kbeo kber kbex kbkb kbkk kbkl kbko kbkr kblb kble kbll kblo kblr kbob kboc kboe kbok kboo kbox kbrb kbrc kbre kbrk kbrl kbro kbrx kbxb kbxl kbxr kbxx kc-x kcbc kcbk kcbl kcbr kcbx kccb kccc kcck kccl kccr kceb kcec kcee kcel kceo kckc kckk kckl kcko kckr kckx kclc kcle kclk kcll kclr kclx kcob kcoe kcol kcor kcox kcrc kcro kcrr kcrx kcxl kcxr kebb kebc kebe kebr keck keco kecr keek keel keer kekb kekc keke kekl keko kele kelk kell kelo keok keol ker- kerb kerc kere kerk kerl kero kerr kerx kexb kexl kexo kexx kkbb kkbe kkbl kkbo kkbr kkcb kkck kkcl kkco kkcr kkex kkkk kklb kklc kkll kklo kklx kkob kkol kkoo kkor kkrb kkrc kkre kkrk kkrl kkro kkrr kkrx kkxk kkxl kkxx klbb klbc klbe klbl klcb klcc klce klck klcl klcr klcx kleb klec klee klek kleo kler klex klkc klkk klkl klko klkr klkx kllb kllc klle kllk klob kloc kloe klok klol kloo klor klox klrc klrk klrr klrx klxk klxr klxx kobb kobc kobe kobk kobo kobr kocb kock koel kokb kokc koke kokk koko kokr kokx kolb kolc kole kolk koll kolo kolr koob kooc kook kool kooo koor korb korc kore kork korl koro korr koxc koxe koxr krbb krbe krbk krbl krbr krbx krcb krcc krce krcl krco kreb krec kree krek kreo krex krkc krke krkk krko krkr krkx krlc krle krlx krob kroc kroe krok krol kroo kror krox krrb krrc krre