a-a a-b a-i aaa aab aai aan aao aar aav ab- aba abb abi abn abo abr abv ai- aia aib aii ain aio air aiv an- ana anb ani ann ano anr anv aoa aob aoi aon aoo aor aov ar- ara arb ari arn aro arr arv av- ava avb avi avn avo avr baa bab bai ban bao bar bav bba bbb bbi bbn bbo bbr bi- bia bib bii bin bio bir biv bna bnb bni bnn bno bnr bnv boa bob boi bon boo bor bov bra brb bri brn bro brr brv bva bvb bvi bvn bvo bvr bvv i-v ia- iaa iab iai ian iao iar iav iba ibb ibi ibn ibo ibr ibv iia iib iii iin iio iir in- ina inb ini inn ino inr inv io- ioa iob ioi ion ioo ior iov ir- ira irb iri irn iro irr irv iva ivb ivi ivo ivr ivv n-i naa nab nai nan nao nar nav nba nbb nbi nbn nbo nbr nbv nia nib nii nin nio nir niv nna nnb nni nnn nno nnv no- noa nob noi non noo nor nov nra nrb nri nrn nro nrr nrv nva nvb nvi nvn nvv o-i oaa oab oai oan oao oar oav ob- oba obb obi obn obo obr obv oia oib oii oin oio oir oiv on- ona onb oni onn ono onr oo- ooa oob ooi oon ooo oor oov or- ora orb ori orn oro orr orv ov- ova ovb ovi ovo ovv ra- raa rab rai ran rao rar rav rba rbb rbi rbn rbo rbr ria rib rii rin rio rir riv rna rnb rni rnn rno rnr rnv roa rob roi ron roo ror rov rra rrb rri rrn rrr rva rvb rvi rvn rvo rvr rvv v-a vaa vab vai van vao var vav vba vbi vbo vbr vbv vi- via vib vii vin vio vir viv vn- vna vni vno vnr vnv voa vob voi von voo vor vov vra vrb vri vrn vrr vva vvb vvi vvo vvr vvv