a-a a-i aaa aai aao aar aax aay ai- aia aii aio air aix aiy aoa aoi aoo aor aox ar- ara ari aro arr arx ary ax- axa axi axo axr axx ay- aya ayi ayo ayr ayx ia- iaa iai iao iar iia iii iio iir iix io- ioa ioi ioo ior ir- ira iri iro irr irx iry ixi ixy iya iyo iyr iyy o-i oaa oai oao oar oax oia oii oio oir oo- ooa ooi ooo oor oox or- ora ori oro orr orx ory ox- oxa oxi oxo oxx oxy oya oyi oyo ra- raa rai rao rar rax ray ria rii rio rir rix riy roa roi roo ror rox roy rra rri rrr rxr ry- rya ryo ryr ryy xaa xar xia xii xio xix xoa xoi xoo xor xox xrx xry xxi xxo xxx xxy xyr xyy yaa yai yao yar yax yay yii yio yir yoi yoo yor yox yoy yra yro yxa yxy yyy