a-a a-b a-i aaa aab aai aan aao aar aav aax ab- aba abb abi abn abo abr abv abx ai- aia aib aii ain aio air aiv aix an- ana anb ani ann ano anr anv anx aoa aob aoi aon aoo aor aov aox ar- ara arb ari arn aro arr arv arx av- ava avb avi avn avo avr avx ax- axa axi axn axo axr axv axx baa bab bai ban bao bar bav bax bba bbb bbi bbn bbo bbr bbx bi- bia bib bii bin bio bir biv bix bna bnb bni bnn bno bnr bnv bnx boa bob boi bon boo bor bov box bra brb bri brn bro brr brv brx bva bvb bvi bvn bvo bvr bvv bxb bxi bxn bxo bxx i-v ia- iaa iab iai ian iao iar iav iba ibb ibi ibn ibo ibr ibv ibx iia iib iii iin iio iir iix in- ina inb ini inn ino inr inv inx io- ioa iob ioi ion ioo ior iov ir- ira irb iri irn iro irr irv irx iva ivb ivi ivo ivr ivv ivx ixi ixn n-i naa nab nai nan nao nar nav nax nba nbb nbi nbn nbo nbr nbv nbx nia nib nii nin nio nir niv nix nna nnb nni nnn nno nnv no- noa nob noi non noo nor nov nox nra nrb nri nrn nro nrr nrv nrx nva nvb nvi nvn nvv nxv o-i oaa oab oai oan oao oar oav oax ob- oba obb obi obn obo obr obv obx oia oib oii oin oio oir oiv on- ona onb oni onn ono onr onx oo- ooa oob ooi oon ooo oor oov oox or- ora orb ori orn oro orr orv orx ov- ova ovb ovi ovo ovv ox- oxa oxb oxi oxn oxo oxx ra- raa rab rai ran rao rar rav rax rba rbb rbi rbn rbo rbr rbx ria rib rii rin rio rir riv rix rna rnb rni rnn rno rnr rnv roa rob roi ron roo ror rov rox rra rrb rri rrn rrr rva rvb rvi rvn rvo rvr rvv rxr v-a vaa vab vai van vao var vav vax vba vbi vbo vbr vbv vi- via vib vii vin vio vir viv vix vn- vna vni vno vnr vnv voa vob voi von voo vor vov vox vra vrb vri vrn vrr vva vvb vvi vvo vvr vvv vxa vxr vxv xaa xan xar xav xbr xbx xia xii xin xio xiv xix xna xno xoa xoi xon xoo xor xov xox xrx xvi xxi xxo xxv xxx