a-a a-b a-i aaa aab aai aar aav aay ab- aba abb abi abr abv aby ai- aia aib aii air aiv aiy ar- ara arb ari arr arv ary av- ava avb avi avr avy ay- aya ayi ayr baa bab bai bar bav bay bba bbb bbi bbr bby bi- bia bib bii bir biv biy bra brb bri brr brv bry bva bvb bvi bvr bvv by- bya byi byr i-v ia- iaa iab iai iar iav iba ibb ibi ibr ibv iby iia iib iii iir ir- ira irb iri irr irv iry iva ivb ivi ivr ivv ivy iya iyr iyy ra- raa rab rai rar rav ray rba rbb rbi rbr ria rib rii rir riv riy rra rrb rri rrr rva rvb rvi rvr rvv rvy ry- rya ryr ryy v-a vaa vab vai var vav vay vba vbi vbr vbv vi- via vib vii vir viv viy vra vrb vri vrr vry vva vvb vvi vvr vvv yaa yab yai yar yav yay ybi ybr yby yii yir yra yva yvi yvr yvy yyb yyy