bbb bbg bbi bbo bbs bbt bby bgb bgg bgi bgo bgs bgt bi- bib big bii bio bis bit biy bob bog boi boo bos bot boy bsb bsg bsi bso bss bst bsy btb btg bti bto bts btt bty by- byg byi byo bys byt gbg gbi gbo gbs gbt gby ggb ggg ggi ggo ggs ggt gib gig gii gio gis git giy gob gog goi goo gos got goy gsb gsg gsi gso gss gst gtb gtg gti gto gts gtt gty gy- gyb gyo gys ibb ibg ibi ibo ibs ibt iby igb igg igi igo igs igt igy iib iii iio iis iit io- iob iog ioi ioo ios iot is- isb isg isi iso iss ist isy itb itg iti ito its itt ity iyo iys iyt iyy o-i ob- obb obg obi obo obs obt oby ogg ogi ogo ogs ogt ogy oib oii oio ois oit oo- oob oog ooi ooo oos oot os- osb osg osi oso oss ost ot- otb otg oti oto ots ott oyi oyo oys sbb sbg sbi sbo sbs sbt sby sgb sgg sgi sgo sgs sgt sib sig sii sio sis sit sob sog soi soo sos sot soy ss- ssb ssg ssi sso sss sst stb stg sti sto sts stt sty sy- syb syg syi sys syt tbb tbg tbi tbo tbs tbt tgb tgg tgi tgo tgs tgt tgy tib tig tii tio tis tit tiy to- tob tog toi too tos tot toy tsb tsg tsi tso tss tst tsy ttb ttg tti tto tts ttt tty tyg tyo tys tyt ybg ybi ybs yby ygo yig yii yio yis yit yob yog yoi yoo yos yot yoy ysb ysg ysi yso yss yst ysy yto yts ytt yyb yyg yys yyt yyy