bbbb bbch bboy bbrc bbyo bcbc bccc bcor bctc bhcc bhor bhot bhoy bhrt bobb bobo boby boch boco boho bohr boht bohy boob booc booh boor boot bor- borh boro borr bort bory botb both boto bott boty boyo brcb brob broc broh broo bror brot brrr brtc bry- bryo btcc btob btor btrc btrt btry bttb bych byob byoc byrt byth c-bo cbbc cbcc cbcr cbct cbot cbrh cbrt cbry cbtc cbyt ccbc cccb cccc cchr cchy ccob ccoc ccrc ccrt cctb cctc cctt chch choc choh choo chor choy chrb chrc chro chrr chrt chto chtr chtt chy- chyc cobb cobh cobo coby coch coco coct coho coob cooh coot cor- corb corc coro corr cort cory cotb cotc coth coto cott coty coyo coyr coyt crbc crcc crcr crob croc croh croo cror crot croy crrt crtc cry- cryb cryo ctor ctot ctrc cybb cybc cybo cyc- cycb cycc cyrt cyt- cytb cyto cyy- cyyc hboc hcbc hccb hccc hcch hhhh hobo hoby hoch hocr hoho hoor hoot horc horo horr hort hory hotb hoth hoto hotr hott hoyt hrob hrrc hrtb hryb htcc htoh httr hybo hyo- hyrt obbo obby obor obot oboy obrh obro ocbc occc occt ocht ocro ocrr oct- octo octy ohcc ohho ohob ohoh ohto ohyo ooby oocr ooho oooh oooo oort oory ootb ooty orbb orbo orby orch orco oro- oror orot oroy orro orry ortc orth orto otho othr oto- otoh otoo otor otoy otro otry otto otyr oych rbbb rbbr rboh rcbc rcbo rccb rccc rchb rctc rcyc rhob rhoc rhoh rob- robb robo robt roby rocc roch roco rohr rohy roob roor root rorc roro rort rory rotc roth roto rotr rott roty royt rrrr rtcc rych ryhb ryob ryoh ryot ryth rytt ryyt tbcb tbcc tbrb tcby tccc tch- tchh tcho tchr tctc thch thoo thor thot thro thtb thtr thyh to-y tobo tobt toby toch toco toho tooh toor toot torc toro torr tort tory totc toth toto totr tott toty toyb toyo toyt trcc troc troo trot troy trtc trtr try- tryb tryo ttbb ttoy tttt tybo tyco tyht tyr- tyro tyrr tyto tytt tyty ybor ybry yccc ycch yctc yobo yoch yoho yoot yoro yort yory yott yoyo yrho ytch ytht yyyy