bbbb bbch bbci bbrc bcbc bccc bcci bcit bcor bctc bhcc bhir bhit bhoi bhor bhot bhrt bibb bibi bibo bicc bich bici bico bihi bio- bioc bioi biot birb biri biro birr birt bitc bith bito bitt bobb bobi bobo boch boco boho bohr boht boi- boii boit boob booc booh boor boot bor- borh bori boro borr bort botb both boti boto bott brcb bric brih brio brit brob broc broh broo bror brot brrr brtc btcc btob btor btrc btrt bttb c-bo cbbc cbcc cbcr cbct cbir cbit cbot cbrh cbrt cbtc ccbc cccb cccc ccci cchr ccic ccii ccir ccob ccoc ccrc ccri ccrt cctb cctc cctt chch chci chib chic chih chir chit choc choh choi choo chor chrb chrc chro chrr chrt chto chtr chtt cibc cibi cibo cicc cich cici cico cicr cict cihr ciht ciii ciit ciob cior cirb circ cirh ciri ciro cirr cirt citb cith citi cito citt cobb cobh cobi cobo coch coco coct coho coir coit coob cooh coot cor- corb corc cori coro corr cort cotb cotc coth coti coto cott crbc crcc crcr crib cric crit crob croc croh croo cror crot crrt crtc ctbi ctic ctor ctot ctrc h-ii hbic hbio hbit hboc hcbc hccb hccc hcch hchi hhhh hi-c hibi hibt hicc hich hico hihc hihi hiho hiht hiit hiob hioc hiri hiro hirt hitc hiti hito hitt hobo hoch hocr hoho hoir hoit hoor hoot horc hori horo horr hort hotb hoth hoti hoto hotr hott hrib hrit hrob hrrc hrtb htcc htoh httr ibot ibrc ibri ibro ibtb ibtc icbc iccb iccc icci icco iccr icct ichc ichi icho ichr icoc icor icrc icrr icrt ihcc ihit ihob ihrc ihtc iiht iiii iiio iiit iioi iioo iirc iitr iitt iobi ioci ioii ioio ioit iooi iooo iori ioto ircc iri- iric irio irob iroc iroh irrc irri irti itch ithc itic itoh itoi itoo itor itri itto obbo obit oboi obor obot obrh obri obro ocbc occc occi occt ochi ocht ocro ocrr oct- octi octo ohcc ohhi ohho ohio ohob ohoh ohto oici oiii oirt oitc oiti oobi oocr ooho oooh oooo oort ootb orbb orbi orbo orch orci orco ori- oric orio orit oro- oror orot orri orro ortc orth orto otho othr otic otit oto- otoh otoo otor otro otti otto rbbb rbbr rboh rcbc rcbo rccb rccc rchb rcic rctc rcti rhib rhio rhob rhoc rhoh rib- ribo ricc rich rico rict riho riht riot riri rith riti rito ritt rob- robb robi robo robt rocc roch roco rohr roio roir roit roob rooi roor root rorc rori roro rort rotc roth roti roto rotr rott rrrr rtcc tbcb tbcc tbit tbrb tccc tch- tchh tchi tcho tchr tctc thch thi- thic thio thir thoo thor thot thri thro thtb thtr tibi ticc tich tico tiht tiit tirb tiri tiro tirr titc tith titi tito titt tobi tobo tobt toch toci toco tohi toho toit tooh toor toot torc tori toro torr tort totc toth toti toto totr tott trcc tri- trib tric trio trit troc troi troo trot trtc trtr ttbb tttt