a-a a-b a-i aaa aab aai aas aau aay ab- aba abb abi abs abu aby ai- aia aib aii ais aiu aiy as- asa asb asi ass asu asy au- aua aub aui aus ay- aya ayi ays ayu b-u baa bab bai bas bau bay bba bbb bbi bbs bbu bby bi- bia bib bii bis biu biy bsa bsb bsi bss bsu bsy bua bub bui bus buu buy by- bya byi bys byu ia- iaa iab iai ias iau iba ibb ibi ibs ibu iby iia iib iii iis iiu is- isa isb isi iss isu isy iu- iua iub iui ius iya iys iyy saa sab sai sas sau say sba sbb sbi sbs sbu sby sia sib sii sis siu ss- ssa ssb ssi sss ssu sua sub sui sus suu suy sy- sya syb syi sys syu ua- uaa uab uai uas uau uay uba ubb ubi ubs ubu uby uia uib uii uis uiu usa usb usi uss usu uua uus uuu uyi uys uyu yaa yab yai yas yau yay ybi ybs yby yii yis ysa ysb ysi yss ysu ysy yua yui yus yuu yuy yyb yys yyu yyy