bbbb bbch bbci bbrc bcbc bccc bcci bcor bhcc bhir bhoi bhor bibb bibi bibo bicc bich bici bico bihi bio- bioc bioi birb biri biro birr bobb bobi bobo boch boco boho bohr boi- boii boob booc booh boor bor- borh bori boro borr brcb bric brih brio brob broc broh broo bror brrr c-bo cbbc cbcc cbcr cbir cbrh ccbc cccb cccc ccci cchr ccic ccii ccir ccob ccoc ccrc ccri chch chci chib chic chih chir choc choh choi choo chor chrb chrc chro chrr cibc cibi cibo cicc cich cici cico cicr cihr ciii ciob cior cirb circ cirh ciri ciro cirr cobb cobh cobi cobo coch coco coho coir coob cooh cor- corb corc cori coro corr crbc crcc crcr crib cric crob croc croh croo cror h-ii hbic hbio hboc hcbc hccb hccc hcch hchi hhhh hi-c hibi hicc hich hico hihc hihi hiho hiob hioc hiri hiro hobo hoch hocr hoho hoir hoor horc hori horo horr hrib hrob hrrc ibrc ibri ibro icbc iccb iccc icci icco iccr ichc ichi icho ichr icoc icor icrc icrr ihcc ihob ihrc iiii iiio iioi iioo iirc iobi ioci ioii ioio iooi iooo iori ircc iri- iric irio irob iroc iroh irrc irri obbo oboi obor obrh obri obro ocbc occc occi ochi ocro ocrr ohcc ohhi ohho ohio ohob ohoh oici oiii oobi oocr ooho oooh oooo orbb orbi orbo orch orci orco ori- oric orio oro- oror orri orro rbbb rbbr rboh rcbc rcbo rccb rccc rchb rcic rhib rhio rhob rhoc rhoh rib- ribo ricc rich rico riho riri rob- robb robi robo rocc roch roco rohr roio roir roob rooi roor rorc rori roro rrrr