bbb bbg bbi bbo bbs bby bgb bgg bgi bgo bgs bi- bib big bii bio bis biy bob bog boi boo bos boy bsb bsg bsi bso bss bsy by- byg byi byo bys gbg gbi gbo gbs gby ggb ggg ggi ggo ggs gib gig gii gio gis giy gob gog goi goo gos goy gsb gsg gsi gso gss gy- gyb gyo gys ibb ibg ibi ibo ibs iby igb igg igi igo igs igy iib iii iio iis io- iob iog ioi ioo ios is- isb isg isi iso iss isy iyo iys iyy o-i ob- obb obg obi obo obs oby ogg ogi ogo ogs ogy oib oii oio ois oo- oob oog ooi ooo oos os- osb osg osi oso oss oyi oyo oys sbb sbg sbi sbo sbs sby sgb sgg sgi sgo sgs sib sig sii sio sis sob sog soi soo sos soy ss- ssb ssg ssi sso sss sy- syb syg syi sys ybg ybi ybs yby ygo yig yii yio yis yob yog yoi yoo yos yoy ysb ysg ysi yso yss ysy yyb yyg yys yyy