-th b-u bbb bbh bbr bbs bbt bbu bby bhb bhh bhr bhs bht bhu brb brh brr brs brt bru bry bsb bsh bsr bss bst bsu bsy btb bth btr bts btt btu bty bub buh bur bus but buu buy by- byh byr bys byt byu hbb hbh hbr hbs hbt hbu hby hhb hhh hhr hhs hht hhu hhy hr- hrb hrh hrr hrs hrt hru hsb hsh hsr hss hst hsu hsy htb hth htr hts htt hty hub huh hur hus hut huu huy hy- hyb hyh hyr hys hyt hyy rbb rbh rbr rbs rbt rbu rh- rhb rhh rhr rhs rht rhu rrb rrh rrr rrs rrt rru rsb rsh rsr rss rst rsu rtb rtr rts rtt rtu rty rub ruh rur rus rut ruu ruy ry- ryr rys ryu ryy sbb sbh sbr sbs sbt sbu sby sh- shb shh shr shs sht shu shy sr- srb srh srr srs srt sry ss- ssb ssh ssr sss sst ssu stb sth str sts stt stu sty sub suh sur sus sut suu suy sy- syb syh syr sys syt syu tbb tbh tbr tbs tbt tbu th- thb thh thr ths tht thu thy trb trh trr trs trt tru try tsb tsh tsr tss tst tsu tsy ttb tth ttr tts ttt ttu tty tub tuh tur tus tut tuu tuy tyr tys tyt ubb ubh ubr ubs ubt ubu uby uhb uhh uhr uhs uht uhu uhy ur- urb urr urs urt uru ury usb ush usr uss ust usu utb uth utr uts utt utu uty uur uus uut uuu uys uyu ybr ybs yby yhs yht yhu yrs yrt yru ysb ysr yss yst ysu ysy yth ytr yts ytt ytu yuh yur yus yut yuu yuy yyb yys yyt yyu yyy