b-u bbb bbi bbq bbs bbt bbu bi- bib bii bis bit biu bqt bsb bsi bss bst bsu btb bti btq bts btt btu bub bui bus but buu ibb ibi ibs ibt ibu iib iii iis iit iiu iqs iqt iqu is- isb isi isq iss ist isu itb iti itq its itt itu iu- iub iui ius iut qbq qbs qis qit qiu qqq qqu qsi qst qti qtq qts qu- qui qus qut sbb sbi sbq sbs sbt sbu sib sii siq sis sit siu sqi sqq sqs ss- ssb ssi ssq sss sst ssu stb sti stq sts stt stu sub sui suq sus sut suu tbb tbi tbs tbt tbu tib tii tis tit tiu tsb tsi tsq tss tst tsu ttb tti tts ttt ttu tub tui tus tut tuu ubb ubi ubs ubt ubu uib uii uiq uis uit uiu usb usi uss ust usu utb uti uts utt utu uus uut uuu