a-a a-b a-i aaa aab aai aar aas aau aay ab- aba abb abi abr abs abu aby ai- aia aib aii air ais aiu aiy ar- ara arb ari arr ars aru ary as- asa asb asi asr ass asu asy au- aua aub aui aur aus ay- aya ayi ayr ays ayu b-u baa bab bai bar bas bau bay bba bbb bbi bbr bbs bbu bby bi- bia bib bii bir bis biu biy bra brb bri brr brs bru bry bsa bsb bsi bsr bss bsu bsy bua bub bui bur bus buu buy by- bya byi byr bys byu ia- iaa iab iai iar ias iau iba ibb ibi ibr ibs ibu iby iia iib iii iir iis iiu ir- ira irb iri irr irs iru iry is- isa isb isi isr iss isu isy iu- iua iub iui iur ius iya iyr iys iyy ra- raa rab rai rar ras rau ray rba rbb rbi rbr rbs rbu ria rib rii rir ris riy rra rrb rri rrr rrs rru rsa rsb rsi rsr rss rsu rua rub rui rur rus ruu ruy ry- rya ryr rys ryu ryy saa sab sai sar sas sau say sba sbb sbi sbr sbs sbu sby sia sib sii sir sis siu sr- sra srb sri srr srs sry ss- ssa ssb ssi ssr sss ssu sua sub sui sur sus suu suy sy- sya syb syi syr sys syu ua- uaa uab uai uar uas uau uay uba ubb ubi ubr ubs ubu uby uia uib uii uir uis uiu ur- ura urb uri urr urs uru ury usa usb usi usr uss usu uua uur uus uuu uyi uys uyu yaa yab yai yar yas yau yay ybi ybr ybs yby yii yir yis yra yrs yru ysa ysb ysi ysr yss ysu ysy yua yui yur yus yuu yuy yyb yys yyu yyy