b-u bbb bbi bbq bbt bbu bby bi- bib bii bit biu biv biy bqt btb bti btq btt btu btv bty bub bui but buu buy bvb bvi bvt bvu bvv by- byi byq byt byu i-v ibb ibi ibt ibu ibv iby iib iii iit iiu iqt iqu itb iti itq itt itu itv ity iu- iub iui iut ivb ivi ivt ivu ivv ivy iyt iyy qbq qit qiu qqq qqu qti qtq qtv qty qu- qui qut quy qv- qvt tbb tbi tbt tbu tbv tib tii tit tiu tiv tiy ttb tti ttt ttu ttv tty tub tui tut tuu tuv tuy tvb tvi tvq tvt tvu tvy tyt ubb ubi ubt ubu ubv uby uib uii uiq uit uiu utb uti utt utu utv uty uut uuu uvb uvu uvv uyi uyu vbi vbv vi- vib vii vit viu viv viy vtb vti vtt vtu vtv vty vut vuv vvb vvi vvt vvv vyt ybi yby yii yiq yit yqb yqt ytt ytu ytv yui yut yuu yuv yuy yvi yvy yyb yyt yyu yyy