bbbb bbbs bibb bibi bibo bibs biis biko bio- bioi bios birb biri birk biro birr birs bis- bisk biso biss bizz bobb bobi bobo bobs boi- boii bois boki boko boks boob book boor boos booz bor- bori bork boro borr bors borz bosi bosk boso boss bozi bozo brik brio bris briz brkb brob brok broo bror bros broz brrr brrs brsb brsr bsos bzrk bzzz ibis ibos ibri ibro ibss iiii iiio iiis iioi iioo iios iirs iisi iisr ikki ikko ikoo ikri iobi ioii ioio ioko iooi iooo ioos iori iors ioso iri- irio iris irki irks irob irri irrs isis isko iso- isok isor isos isri issi isso issr isss izki izso izzo k-os kbbb kbbi kbbk kbbo kbbr kbbs kbbz kbib kbik kbio kbis kbiz kbkb kbkk kbko kbkr kbkz kbob kboi kbok kboo kbos kboz kbrb kbri kbrk kbro kbrz kbsb kbsi kbsk kbso kbsr kbss kbsz kbzi kbzo kbzs kbzz kibb kibi kibo kibr kibs kibz kiii kiik kiis kiki kikk kiko kikr kikz kioi kiok kioo kioz kirb kiri kirk kiro kirr kirs kisi kisk kiso kisr kiss kizs kizz kkbb kkbi kkbo kkbr kkbs kkbz kkik kkkk kkob kkoo kkor kkoz kkrb kkrk kkro kkrr kkrs kkrz kksi kksr kkss kkzz kobb kobi kobk kobo kobr kobs koii koir kokb koki kokk koko kokr koks kokz koob kooi kook kooo koor koos kooz korb kori kork koro korr kors kos- kosb kosi koso kosr koss kosz kozb kozi kozk kozo kozr krbb krbi krbk krbr krbz krib krik krio kris kriz krki krkk krko krkr krks krkz krob kroi krok kroo kror kros kroz krrb krri krrk krro krrr krrs krrz krsk krsr krss krzi krzk krzr krzs krzz ksbi ksbr ksbs ksbz ksib ksii ksik ksir ksis ksiz kskb kskk ksko kskr ksks kskz ksob ksoi ksok ksoo ksor ksos ksrb ksro ksrr ksrs ksrz kssi ksso kssr ksss kssz kszr kzbb kzbi kzbk kzbr kzbs kzbz kzio kziz kzkr kzks kzkz kzoi kzoo kzor kzoz kzrb kzrk kzro kzrr kzrs kzrz kzsb kzzb kzzi kzzk kzzo kzzr kzzs kzzz obbo obis obkb oboi obok obor obos obri obro obsr obss oiii oiko oiks oios okir okko okok okor okro oksi okso oobi oooo ooos oosi oozi orbb orbi orbo orbs ori- orio oris orko oro- orok oror oros oroz orri orro orrs orsi orsk orso orzk orzo osii osik osis oski osoi osoo osor osos osro ossb ossi osso rbbb rbbr rbbs rbis rbss rib- ribo ribs riis riki rikk rios rioz riri rirs risi risk riso riss rizi rizk rizz rkos rkss rob- robb robi robo robs roik roio roir rois roiz roki rokk roko rokr roks roob rooi rook roor roos rooz rori rork roro rosi roso ross rozi rozz rrrr rsbi rsis rsos s-ib s-ii s-os sbbs sbor sbrk sbsi sibi sibo sibs siik siki siko sikr siks sior sios siri sirk siro sirr sirs sisi sisk siss sizz skik skio skir skis skor skss sobo sobr sobs soik soir sois soki sokk soko sook soor soos sorb sori soro sorr sors sosi soso soss soz- sozi srib sris sros ssbr ssis ssri ssrs sssb sssi ssss szis szob szss z-ro zbik zibo ziki zikr ziks ziri ziro zisi zisk zizi zizz zobo zoio zois zoo- zook zoos zorb zori zork zoro zors zoso zoss zozo zsss zzzs zzzz