bbbb bibb bibi bibo biko bio- bioi biot bito bitt biw- bobb bobi bobo bobw boi- boii boit boki boko boob book boot boow botb boti boto bott botw bowi bowk bowt btob bttb btwo ibot ibtb iiii iiio iiit iioi iioo iitt iiwi ikki ikko ikoo ikwo iobi ioii ioio ioit ioko iooi iooo ioto itko itoi itoo itto iwiw kbbb kbbi kbbk kbbo kbbt kbbw kbib kbik kbio kbit kbkb kbkk kbko kbkw kbob kboi kbok kboo kbot kbow kbtb kbtk kbto kbtt kbtw kbwb kbww kibb kibi kibo kibt kiii kiik kiit kiki kikk kiko kikt kioi kiok kioo kiot kiow kiti kito kitt kiwb kiwi kkbb kkbi kkbo kkbt kkik kkit kkkk kkob kkoo kkot kkow kktk kkwb kkwk kobb kobi kobk kobo koii koit kokb koki kokk koko koob kooi kook kooo koot kotb koti kotk koto kott kowb kowi ktbb ktbt ktib ktik ktkb ktkk ktko ktkt ktob ktok ktoo ktot ktti kttk ktto kttt kttw ktwb ktwi ktwo kwbi kwbt kwbw kwik kwit kwkb kwkk kwkw kwok kwow kwto kwtw kwwk kwwt obbo obit obkb oboi obok obot oiii oiko oiti okko okok okot okto oobi oooo ootb ootw otit oto- otok otoo otow otti otto otwo owow owt- owtt tbit tibi tiit tiki tiko titi tito titt tiwi tobi tobo tobt toit toki toko took toot toti toto tott towk ttbb tttt twbt twi- twib twik twit two- twob twoo twot wbbb wbbi wbbk wbbo wbbt wbbw wbib wbik wbio wbiw wbkb wbkk wbko wbkt wbkw wbob wboi wbok wbow wbti wbtk wbto wbtt wbtw wbwb wbwi wbwo wbwt wibb wibi wibt wibw wiii wiik wiit wikb wiki wikk wiko wiob wioi wiok wioo wiot witi witk witt wiwi wkbi wkbk wkbo wkbw wkib wkii wkik wkio wkiw wkkb wkki wkko wkkt wkkw wkok wkoo wkot wkow wkti wktk wkto wktt wkwi wobb wobo wobt woio wokb woki wokk woko wokw woob wook woot woow wotb wott wotw wowb wowi wowo wowt woww wtbb wtbi wtbk wtbo wtib wtik wtki wtkk wtkt wtkw wtob wtok wtot wtow wttb wtti wtto wttt wttw wtwb wtwk wtwo wtwt wtww wwbb wwbt wwib wwii wwik wwio wwkb wwki wwot wwow wwti wwtk wwtw wwwi wwwk wwww