bbbb bbbs bbws bibb bibi bibo bibs biis biko bio- bioi bios bis- bisk biso biss biw- bobb bobi bobo bobs bobw boi- boii bois boki boko boks boob book boos boow bosi bosk boso boss bowi bowk bows bsos ibis ibos ibss iiii iiio iiis iioi iioo iios iisi iiwi ikki ikko ikoo ikwo iobi ioii ioio ioko iooi iooo ioos ioso isis isko iso- isok isos issi isso isss iwis iwiw k-os kbbb kbbi kbbk kbbo kbbs kbbw kbib kbik kbio kbis kbkb kbkk kbko kbkw kbob kboi kbok kboo kbos kbow kbsb kbsi kbsk kbso kbss kbsw kbwb kbww kibb kibi kibo kibs kiii kiik kiis kiki kikk kiko kioi kiok kioo kiow kisi kisk kiso kiss kisw kiwb kiwi kkbb kkbi kkbo kkbs kkik kkkk kkob kkoo kkow kksi kkss kksw kkwb kkwk kkws kobb kobi kobk kobo kobs koii kokb koki kokk koko koks koob kooi kook kooo koos kos- kosb kosi koso koss kowb kowi ksbi ksbs ksbw ksib ksii ksik ksis ksiw kskb kskk ksko ksks ksob ksoi ksok ksoo ksos ksow kssi ksso ksss kswb kswi kswo ksws ksww kwbi kwbw kwik kwkb kwkk kwkw kwok kwos kwow kwsk kwso kwss kwsw kwwk kwws obbo obis obkb oboi obok obos obss oiii oiko oiks oios okko okok oksi okso oobi oooo ooos oosi osii osik osis oski osoi osoo osos osow ossb ossi osso owow s-ib s-ii s-os sbbs sbsi sibi sibo sibs siik siki siko siks sios sisi sisk siss siwi skik skio skis skow skss skws sobo sobs soik sois soki sokk soko sook soos sosi soso soss sowi sowk sows ssis sssb sssi ssss ssws swbs swbw swis swob swoo swow swss wbbb wbbi wbbk wbbo wbbs wbbw wbib wbik wbio wbis wbiw wbkb wbkk wbko wbks wbkw wbob wboi wbok wbos wbow wbsb wbss wbsw wbwb wbwi wbwo wibb wibi wibs wibw wiii wiik wiis wikb wiki wikk wiko wiks wiob wioi wiok wioo wios wisk wiso wiss wisw wiwi wkbi wkbk wkbo wkbw wkib wkii wkik wkio wkis wkiw wkkb wkki wkko wkks wkkw wkok wkoo wkos wkow wksb wksk wkso wkss wksw wkwi wkws wobb wobo woio wois wokb woki wokk woko woks wokw woob wook woos woow woso woss wosw wowb wowi wowo wows woww wsbb wsbi wsbk wsbs wsbw wsib wsis wskb wski wskk wsko wskw wsob wsok wsoo wsos wssi wsss wssw wswb wswi wsws wsww wwbb wwib wwii wwik wwio wwis wwkb wwki wwks wwos wwow wwsb wwsi wwsk wwss wwwi wwwk wwws wwww