bbbb bbbs bbrc bcbc bcbs bccc bccs bcor bcos bcrs bcsc bcsn bcss bnoc bnor bnrr bnss bobb bobo bobs boco bocs bonc bonn bono bons boob booc boon boor boos bor- born boro borr bors bosc bosn boso boss brcb brno brns brob broc bron broo bror bros brrr brrs brsb brsr bscs bsns bson bsos bssc c-bo cbbc cbbs cbcc cbcn cbcr cbcs cbrn cbsc cbsn ccbc ccbn cccb cccc cccs ccnb ccnc ccnr ccns ccob ccoc ccrc ccrs ccsn ccss cnbc cnco cnrc cnrr cnss cobb cobo cobs coco con- conc conn cono cons coob coon coos cor- corb corc corn coro corr cors cosc coso coss crbc crcc crcr crns crob croc cron croo cror crss cscb cscc csco cscr cscs csob csor csos csrc csrs cssr nbbc nbbo nbcc nbco nbcs ncbc ncbs nccc nccn nccr nccs ncnc ncoc ncor ncos ncrc ncsc ncss nnnn nnos nnss nobc nobo nobs noco nocs non- nonn nono nons noo- noob noon nooo noor noos nor- norb norc norn noro norr nors nos- noss nrcs nroc nron nrrc nrsc nsbo nscc nscs nsnr nsos nsrc nssb nssc nsso nssr nsss obbo obon obor obos obro obsn obsr obss ocbc occc occn ocon ocos ocro ocrr ocrs onc- onco onno onon onor onos onsc onso oocr oons oooo ooos orbb orbo orbs orco orcs ornc orno orns oro- oron oror oros orro orrs orso oscc osco osno osnr osoo osor osos osro ossb osso rbbb rbbr rbbs rbss rcbc rcbo rccb rccc rccs rcnr rcon rcos rcsc rcss rnbr rnco rncs rob- robb robo robs rocc roco rocs ronc rono rons roob roon roor roos rorc roro rosc roso ross rrrr rscc rscn rscs rsnn rsno rsnr rsos s-os sbbs sbcc sbcs sbor sccc sccs scnr scob scon scoo scor scr- scrc scrn scrs scsc scsn scso scsr sncc snco snns snob snoc snoo snor snos snrs sobo sobr sobs soco socr socs son- sono sons soon soor soos sorb sorn soro sorr sors soso soss srbc srcc srnn srno sros ssbn ssbr sscc sscs ssns ssoc ssrc ssrs sssb sssc ssss