bbbb bbbs bbhs bhhs bhir bhit bhoi bhor bhot bhrt bibb bibi bibo bibs bihi bihs biis bio- bioi bios biot birb biri biro birr birs birt bis- bish biso biss bist bith bito bits bitt bobb bobi bobo bobs boho bohr bohs boht boi- boii bois boit boob booh boor boos boot bor- borh bori boro borr bors bort bosh bosi boso boss bost botb both boti boto bots bott brhs brih brio bris brit brob broh broo bror bros brot brrr brrs brsb brsr brst bshs bsos bsts bths btob btor btrt btss bttb h-ii hbbs hbhs hbio hbit hbos hbrs hbss hhhh hhhs hibi hibt hihi hiho hiht hiis hiit hiob hiri hiro hirs hirt hisb hish hiss hist hiti hito hits hitt hobo hobs hoho hoir hois hoit hoor hoos hoot hori horo horr hors hort hosh hoss host hotb hoth hoti hoto hotr hots hott hrhs hrib hrit hrob hros hrso hrtb hshs hsob hsts hths htoh httr ibis ibos ibot ibri ibro ibss ibtb ibts ihis ihit ihob ihss iiht iiii iiio iiis iiit iioi iioo iios iirs iisi iisr iist iitr iitt iobi ioii ioio ioit iooi iooo ioos iori iors ioso ioto irhs iri- irio iris irob iroh irri irrs irti irts isbt ishi ishr ishs isis isit iso- isor isos isri issh issi isso issr isss isth isti isto istr ists itbs iths itis itoh itoi itoo itor itos itri itrs itsi itso itto obbo obhs obis obit oboi obor obos obot obrh obri obro obsr obss obst obts ohhi ohho ohhs ohio ohis ohob ohoh ohos ohso ohss ohto oiii oios oirt oist oiti oobi ooho oohs oooh oooo ooos oort oosi oost ootb oots orbb orbi orbo orbs orhs ori- orio oris orit oro- oror oros orot orri orro orrs orsi orso orth orto orts oshi osho oshs osii osis osoi osoo osor osos osro ossb ossi osso osti ostr osts otbs otho othr oths otis otit oto- otoh otoo otor otos otro otrs otso otti otto otts rbbb rbbr rbbs rbhs rbis rboh rbss rbst rhhs rhib rhio rhob rhoh rhos rib- ribo ribs riho rihs riht riis rios riot riri rirs rish risi riso riss rist rith riti rito rits ritt rob- robb robi robo robs robt rohr rohs roio roir rois roit roob rooi roor roos root rori roro rort rosh rosi roso ross rost roth roti roto rotr rots rott rrhs rrrr rsbi rshs rsis rsos rsts rths rtss rtts s-ib s-ii s-os sbbs sbhs sbor sbot sbsi sbst shbs shbt shhh shhs shib shih shii shio shir shis shit shoo shor shos shot shri shrs shts sibi sibo sibs sihi sihr sihs siht siit sior sios siot siri siro sirr sirs sirt sish sisi siss sist sit- sith siti sito sits sitt sobo sobr sobs sobt sohh soho sohs soir sois soit soor soos soot sorb sorh sori soro sorr sors sort sosh sosi soso soss sost soth soto sots srhs srib sris sros srtr ssbr sshs ssis ssit ssot ssri ssrs sssb sssh sssi ssss sstb ssth ssts stbs sths stib stih stio stir stis stit stob stoo stor stos stot stri stro strs stsi stss sttr tbbs tbhs tbit tbrb tbst thbs thi- thio thir this thoo thor thos thot thri thro thsr thss thtb thtr thts tibi tibs tiht tiit tios tirb tiri tiro tirr tirs tisb tish tisi tiso tiss tist tith titi tito tits titt tobi tobo tobs tobt tohi toho tois toit tooh toor toos toot tori toro torr tors tort tosb tosh tosi toso toss tost toth toti toto totr tots tott trhs tri- trib trio tris trit troi troo tros trot trsi trst trtr tshb tshi tshs tsis tsob tsoi tsos tssi tssr tsst tsts ttbb ttss tttt