bbbb bbch bbrc bcbc bccc bcor bhcc bhor bnoc bnor bnrr bobb bobo boch boco bohn boho bohr bonc bonn bono boob booc booh boon boor bor- borh born boro borr brcb brno brob broc broh bron broo bror brrr c-bo cbbc cbcc cbcn cbcr cbrh cbrn ccbc ccbn cccb cccc cchr ccnb ccnc ccnr ccob ccoc ccrc chch chnb chnc chno chnr choc choh chon choo chor chrb chrc chrn chro chrr cnbc cnco cnoh cnrc cnrr cobb cobh cobo coch coco cohn coho con- conc conn cono coob cooh coon cor- corb corc corn coro corr crbc crcc crcr crob croc croh cron croo cror hboc hcbc hccb hccc hcch hhhh hobo hoch hocn hocr hohn hoho hono hoon hoor horc horn horo horr hrob hron hrrc nbbc nbbo nbcc nbco ncbc nccc nccn nccr nchc ncnc ncoc ncor ncrc nhcc nhnn nhon nhrc nnnn nobc nobo noch noco nohn noho non- nonn nono noo- noob noon nooo noor nor- norb norc norn noro norr nroc nron nrrc obbo obon obor obrh obro ocbc occc occn ocon ocro ocrr ohcc ohho ohno ohob ohoh ohrn onc- onco onno onon onor oocr ooho oooh oooo orbb orbo orch orco ornc orno oro- oron oror orro rbbb rbbr rboh rcbc rcbo rccb rccc rchb rcnr rcon rhob rhoc rhoh rhon rnbr rnco rob- robb robo rocc roch roco rohn rohr ronc rono roob roon roor rorc roro rrrr