bbbb bbbs bbrg bggs bibb bibi bibo bibs bigb bigg bigo bigs biis biko bio- biog bioi bios birb birg biri birk biro birr birs bis- bisk biso biss bobb bobi bobo bobs bogg bogi bogo bogs boi- boii bois boki boko boks boob boog book boor boos bor- borg bori bork boro borr bors bosi bosk boso boss brig brik brio bris brkb brob brog brok broo bror bros brrr brrs brsb brsr bsgs bsos gbbo gbbs gggg ggss gibb gibs gigg gigi gigo gigs giis giog gioi girg giri girk giro girr girs giss gobi gobo gobs gogi gogo gogs gois goog gooi gook goor goos gorb gorg gori goro gorr gors gosi goso goss grbr grib grig gris grob grog groi grok groo gror gros grrr grrs grss gsis gskb gsos i-go ibis ibos ibri ibro ibss igbo iggs igis igoo igor igri igso iiii iiio iiis iioi iioo iios iirs iisi iisr ikig ikki ikko ikoo ikri iobi ioii ioio ioko iooi iooo ioos iorg iori iors ioso irgs iri- irig irio iris irki irks irob irri irrs irsg isis isko iso- isok isor isos isrg isri issi isso issr isss k-os kbbb kbbg kbbi kbbk kbbo kbbr kbbs kbgb kbgg kbgo kbgr kbib kbig kbik kbio kbis kbkb kbkg kbkk kbko kbkr kbob kboi kbok kboo kbos kbrb kbrg kbri kbrk kbro kbsb kbsg kbsi kbsk kbso kbsr kbss kgbb kgbr kggg kggi kggo kggr kgio kgir kgks kgor kgos kgrb kgrg kgri kgrk kgro kgrr kgrs kgso kgsr kibb kibg kibi kibo kibr kibs kigo kigs kiii kiik kiis kiki kikk kiko kikr kioi kiok kioo kirb kiri kirk kiro kirr kirs kisi kisk kiso kisr kiss kkbb kkbg kkbi kkbo kkbr kkbs kkgb kkgo kkgr kkik kkkk kkob kkoo kkor kkrb kkrk kkro kkrr kkrs kksi kksr kkss kobb kobi kobk kobo kobr kobs kogb kogg kogi kogo koii koir kokb koki kokk koko kokr koks koob koog kooi kook kooo koor koos korb korg kori kork koro korr kors kos- kosb kosg kosi koso kosr koss krbb krbg krbi krbk krbr krgi krgs krib krik krio kris krki krkk krko krkr krks krob krog kroi krok kroo kror kros krrb krrg krri krrk krro krrr krrs krsk krsr krss ksbi ksbr ksbs ksgg ksgr ksib ksig ksii ksik ksir ksis kskb kskg kskk ksko kskr ksks ksob ksoi ksok ksoo ksor ksos ksrb ksrg ksro ksrr ksrs kssi ksso kssr ksss obbo obis obkb oboi obok obor obos obri obro obsr obss ogb oggi ogog ogoi ogri ogro ogsi oigo oiii oiko oiks oios okgo okir okko okok okor okro oksi okso oobi oooo ooos oosi orbb orbi orbo orbs orgo orgs ori- orig orio oris orko oro- orok oror oros orri orro orrs orsi orsk orso osgi osii osik osis oski osoi osoo osor osos osro ossb ossi osso rbbb rbbr rbbs rbis rbss rgbi rib- ribo ribs rigg rigi rigo rigs riis riki rikk rios riri rirs risi risk riso riss rkos rkss rob- robb robi robo robs rogg rogi rogo roig roik roio roir rois roki rokk roko rokr roks roob roog rooi rook roor roos rori rork roro rosi roso ross rrrr rsbi rsgb rsis rsos s-ib s-ii s-os sbbs sbig sbor sbrk sbsi sggg sggs sgio sgro sgss sibi sibo sibs sigg sigi sigo sigs siik siki siko sikr siks sior sios siri sirk siro sirr sirs sisi sisk siss skig skik skio skir skis skog skor skss sobo sobr sobs sogi sogo sogs soik soir sois soki sokk soko soog sook soor soos sorb sorg sori soro sorr sors sosi soso soss srgb srib sris sros ssbr ssgs ssis ssrg ssri ssrs sssb sssi ssss