bbbb bblb bbrc bcbc bccc bccl bcor blkb blno blob bloc blok blon bloo blrc bnoc bnor bnrr bobb bobo bock boco bokn boko bolk boll boln bolo bonc bonk bonn bono boob booc book bool boon boor bor- bork born boro borr brcb brkb brno brob broc brok brol bron broo bror brrr c-bo cbbc cbcc cbcl cbcn cbcr cbkl cbkn cbko cbkr cblb cblc cbln cbol cbrl cbrn ccbc ccbn cccb cccc cccl cclc ccnb ccnc ccnr ccob ccoc ccrc ccrl ckbc ckck ckcl ckco ckln cknb cknc ckob ckoc ckoo ckor ckrc clob clok clon cloo clor clro cnbc cnbl cnco cnrc cnrr cobb cobo cock coco cok- coko col- colb colk coll coln colo con- conc conk conn cono coob cook cool coon cor- corb corc cork corl corn coro corr crbc crcc crcr crkc crkl crob croc crok crol cron croo cror k-lo kbbb kbbc kbbk kbbl kbbo kbbr kbcb kbck kbcl kbco kbcr kbkb kbkk kbkl kbko kbkr kblb kbll kblo kblr kbnl kbnn kbno kbnr kbob kboc kbok kbon kboo kbrb kbrc kbrk kbrl kbrn kbro kcbc kcbk kcbl kcbr kccb kccc kcck kccl kccr kckc kckk kckl kckn kcko kckr kclc kclk kcll kcln kclr kcnb kcno kcnr kcob kcol kcon kcor kcrc kcrn kcro kcrr kkbb kkbl kkbn kkbo kkbr kkcb kkck kkcl kkcn kkco kkcr kkkk kklb kklc kkll kkln kklo kknb kknn kkno kkob kkol kkon kkoo kkor kkrb kkrc kkrk kkrl kkrn kkro kkrr klbb klbc klbl klbn klcb klcc klck klcl klcn klcr klkc klkk klkl klkn klko klkr kllb kllc kllk klnc klnn klno klob kloc klok klol klon kloo klor klrc klrk klrn klrr knbb knbc knbn knbr kncb knck kncn knco kncr knkk knlb knlc knlr knnb knnk knnr knob knoc knok knol knon knor knrb knrk knro kobb kobc kobk kobn kobo kobr kocb kock kocn kokb kokc kokk kokn koko kokr kolb kolc kolk koll koln kolo kolr konc konk kono koob kooc kook kool koon kooo koor korb korc kork korl korn koro korr krbb krbk krbl krbr krcb krcc krcl krcn krco krkc krkk krkn krko krkr krlc krln krnb krnk krnn krno krob kroc krok krol kroo kror krrb krrc krrk krrl krrn krro krrr lbcc lblr lcbc lccc lcor lcrl llcc lllc llll lloc lloo lncr lnnk lob- lobb lobo locc lock locn loco lokk loko loll lolo lonk lono lonr loob looc look lool loon loor lork lorn loro lroc lron lrrc lrrr nbbc nbbo nbcc nbco ncbc nccc nccn nccr nclc ncln nclr ncnc ncoc ncor ncrc nkok nkor nlcc nlrb nnnn nobc nobo nock nocl noco noko noll nolo non- nonn nono noo- noob nook nool noon nooo noor nor- norb norc nork norn noro norr nrlb nroc nron nrrc nrrl obbo obkb obok obol obon obor obro ocbc occc occn oclc ocon ocrl ocro ocrr okko oklo okno okok okol okon okor okro olbo olcc ollo olon olor onc- onco onno onon onor oocr oolo oooo orbb orbo orco orko orlo ornc orno oro- orok oron oror orro rbbb rbbr rbcl rcbc rcbo rccb rccc rcnl rcnr rcon rnbr rnco rob- robb robo rocc rock roco rokk roko rokr rolk roll rolo ronc ronk rono roob rook rool roon roor rorc rork roro rrrr