bbbb bboy bbrc bbyo bcbc bccc bcor bctc bnoc bnor bnrr bobb bobo boby boco bonc bonn bono bont bony boob booc boon boor boot bor- born boro borr bort bory botb botn boto bott boty boyn boyo brcb brno brob broc bron broo bror brot brrr brtc bry- bryn bryo btcc btob btor btrc btrt btry bttb bync byno byob byoc byon byrn byrt c-bo cbbc cbcc cbcn cbcr cbct cbot cbrn cbrt cbry cbtc cbyt ccbc ccbn cccb cccc ccnb ccnc ccnr ccny ccob ccoc ccrc ccrt cctb cctc cctt cnbc cnco cnrc cnrr cnrt cntc cntr cobb cobo coby coco coct con- conc conn cono cont cony coob coon coot cor- corb corc corn coro corr cort cory cotb cotc cotn coto cott coty coyn coyo coyr coyt crbc crcc crcr crob croc cron croo cror crot croy crrt crtc cry- cryb cryn cryo ctor ctot ctrc ctrn cttn cybb cybc cybo cyc- cycb cycc cyn- cyno cyon cyrt cyt- cytb cyto cyy- cyyc cyyn nbbc nbbo nbcc nbco nboy nbty ncbc nccc nccn nccr ncct ncnc ncoc ncor ncrc nctc nctr nnnn nnot nntn nobc nobo noco noct non- nonn nono nont noo- noob noon nooo noor noot nor- norb norc norn noro norr nort nory not- noto nott noyo noyt nroc nron nrrc ntbc ntcc ntrc ntto nttr nycc nyco nycy nynt nyny nyon nyrb nyro nytb nytc obbo obby obon obor obot oboy obro ocbc occc occn occt ocon ocro ocrr oct- octo octy onby onc- onco onct onno onon onor onoy ont- ontc onto ooby oocr oont oooo oort oory ootb ooty orbb orbo orby orco ornc orno orny oro- oron oror orot oroy orro orry ortc orto oto- oton otoo otor otoy otro otry otto otyr oynt oyon rbbb rbbr rcbc rcbo rccb rccc rcnr rcon rctc rcyc rnbr rnco rnnt rnot rob- robb robo robt roby rocc roco ronc rono ront rony roob roon roor root rorc roro rort rory rotc rotn roto rotr rott roty royn royt rrrr rtcc rynn rynt ryob ryon ryot rytt ryyt tbcb tbcc tbrb tcby tccc tcnn tcon tctc tnbc tncc to-y tobo tobt toby toco tonb tonn tono tony toon toor toot torc torn toro torr tort tory totc toto totr tott toty toyb toyn toyo toyt trcc trno troc tron troo trot troy trtc trtr try- tryb tryo ttbb ttcn tton ttoy tttt tybo tyco tynt tyny tyr- tyro tyrr tyto tytt tyty tyyn ybor ybry yccc yctc ynon ynot yobo yono yont yoon yoot yorn yoro yort yory yott yoyn yoyo yron yryn yyyy