bbb bbi bbo bbs bbw bby bi- bib bii bio bis biw biy biz bob boi boo bos bow boy boz bsb bsi bso bss bsw bsy bwb bwi bwo bws bwy by- byi byo bys byz bzo bzs bzz ibb ibi ibo ibs ibw iby ibz iib iii iio iis iiw io- iob ioi ioo ios iow is- isb isi iso iss isw isy iwb iwi iwo iws iww iwz iyo iys iyy izi izo izy izz o-i ob- obb obi obo obs obw oby oib oii oio ois oiz oo- oob ooi ooo oos oow os- osb osi oso oss osw owb owi owo ows oww oyi oyo oys ozo ozs ozw ozz sbb sbi sbo sbs sbw sby sib sii sio sis siw sob soi soo sos sow soy soz ss- ssb ssi sso sss ssw ssz swb swi swo sws swy sy- syb syi sys szi wbb wbi wbo wbs wbw wbz wib wii wis wiz wob woi woo wos wow woy woz wsb wsi wso wss wsw wwi wwo www wy- wyo wys ybi ybs yby ybz yii yio yis yiz yob yoi yoo yos yow yoy ysb ysi yso yss ysy ysz yyb yys yyy yyz yzb yzy zbb zbs zbw zby zib zio zis ziw ziz zo- zob zoi zoo zos zow zsi zsz zws zzs zzy zzz