a-a a-b a-i aaa aab aai aao aar aav aay ab- aba abb abi abo abr abv aby ai- aia aib aii aio air aiv aiy aoa aob aoi aoo aor aov ar- ara arb ari aro arr arv ary av- ava avb avi avo avr avy ay- aya ayi ayo ayr baa bab bai bao bar bav bay bba bbb bbi bbo bbr bby bi- bia bib bii bio bir biv biy boa bob boi boo bor bov boy bra brb bri bro brr brv bry bva bvb bvi bvo bvr bvv by- bya byi byo byr i-v ia- iaa iab iai iao iar iav iba ibb ibi ibo ibr ibv iby iia iib iii iio iir io- ioa iob ioi ioo ior iov ir- ira irb iri iro irr irv iry iva ivb ivi ivo ivr ivv ivy iya iyo iyr iyy o-i oaa oab oai oao oar oav ob- oba obb obi obo obr obv oby oia oib oii oio oir oiv oo- ooa oob ooi ooo oor oov or- ora orb ori oro orr orv ory ov- ova ovb ovi ovo ovv oya oyi oyo ra- raa rab rai rao rar rav ray rba rbb rbi rbo rbr ria rib rii rio rir riv riy roa rob roi roo ror rov roy rra rrb rri rrr rva rvb rvi rvo rvr rvv rvy ry- rya ryo ryr ryy v-a vaa vab vai vao var vav vay vba vbi vbo vbr vbv vi- via vib vii vio vir viv viy voa vob voi voo vor vov voy vra vrb vri vrr vry vva vvb vvi vvo vvr vvv yaa yab yai yao yar yav yay ybi ybr yby yii yio yir yob yoi yoo yor yoy yra yro yva yvi yvo yvr yvy yyb yyy