bbbb bbbs bbhs bffs bfhs bfsi bfsr bhff bhhs bhir bhoi bhor bhsf bibb bibi bibo bibs biff bifi bihi bihs biis bio- bioi bios birb biri biro birr birs bis- bish biso biss bobb bobi bobo bobs boff bofh bofs boho bohr bohs boi- boii bois boob boof booh boor boos bor- borf borh bori boro borr bors bosh bosi boso boss brhs brih brio bris brob broh broo bror bros brrr brrs brsb brsr bsff bsfs bshs bsos fbhs fbis fbrs ffff ffhs ffii ffrr ffss fhfs fhhs fhrs fhss fibs fiff fifi fifo fiii fior fios firs fish fisi fiss fobs fofo fohr fohs fois foof foos for- forb fori foro forr fors fosb fosh fosi foso foss frhs frib frio fris frob froh fros frsb frso fsfi fsfo fshb fshs fssf h-ii hbbs hbhs hbio hbos hbrs hbss hfhs hfrs hfss hhhh hhhs hhof hibi hiff hifh hifi hifo hifr hihi hiho hiis hiob hirf hiri hiro hirs hisb hish hiss hobo hobs hoff hofs hoho hoif hoir hois hoof hoor hoos hori horo horr hors hosh hoss hrhs hrib hrob hros hrso hsfs hshs hsob ibfi ibis ibos ibri ibro ibsf ibss ifbb ifis ifor ifrb ifrf ifri ifsb ifso ihis ihob ihss iiii iiio iiis iioi iioo iios iirs iisi iisr iobi ioii ioio ioof iooi iooo ioos iori iors ioso irhs iri- irio iris irob iroh irri irrs irsf ishi ishr ishs isis iso- isof isor isos isri issf issh issi isso issr isss obbo obhs obis oboi obor obos obrh obri obro obsr obss off- offh offo offr offs ofor ohhi ohho ohhs ohif ohio ohis ohob ohoh ohos ohso ohss oiii oios oobi ooff oofs ooho oohs oooh oooo ooos oosi orbb orbi orbo orbs orff orfi orfs orhs ori- orif orio oris oro- orof oror oros orri orro orrs orsi orso oshi osho oshs osii osis osoi osoo osor osos osro ossb ossi osso rbbb rbbr rbbs rbhs rbis rboh rbss rfhs rhfs rhhs rhib rhio rhob rhoh rhos rib- ribo ribs riff rifs riho rihs riif riis rios riri rirs rish risi riso riss rob- robb robi robo robs roff rofo rohr rohs roif roio roir rois roob roof rooi roor roos rori roro rosh rosi roso ross rrhs rrif rrrr rsbi rshs rsis rsos s-ib s-ii s-os sbbs sbhs sbor sbsi sfhs sfio sfor sfos sfro sfss shbs shhh shhs shib shih shii shio shir shis shof shoo shor shos shri shrs sibi sibo sibs siff sifo sifr sihi sihr sihs sior sios sirf siri siro sirr sirs sish sisi siss sobo sobr sobs sofi sofo sohh soho sohs soif soir sois soof soor soos sorb sorh sori soro sorr sors sosh sosi soso soss srfi srhs srib sris sros ssbr sshs ssis ssri ssrs sssb sssf sssh sssi ssss