a-a a-b a-i a-z aaa aab aag aai aao aar aav aaz ab- aba abb abg abi abo abr abv abz ag- aga agb agg agi ago agr agv agz ai- aia aib aig aii aio air aiv aiz aoa aob aog aoi aoo aor aov ar- ara arb arg ari aro arr arv arz av- ava avb avg avi avo avr avz az- aza azb azg azi azo azz baa bab bag bai bao bar bav baz bba bbb bbg bbi bbo bbr bga bgb bgg bgi bgo bgr bgv bgz bi- bia bib big bii bio bir biv biz boa bob bog boi boo bor bov boz bra brb brg bri bro brr brv brz bva bvb bvg bvi bvo bvr bvv bza bzo bzr bzz gaa gab gag gai gao gar gav gaz gba gbg gbi gbo gbr gbv gbz gga ggb ggg ggi ggo ggr ggv ggz gia gib gig gii gio gir giv giz goa gob gog goi goo gor gov goz gra grb grg gri gro grr grv gva gvb gvg gvi gvo gvr gza gzo gzr i-v ia- iaa iab iag iai iao iar iav iaz iba ibb ibg ibi ibo ibr ibv ibz iga igb igg igi igo igr iia iib iii iio iir io- ioa iob iog ioi ioo ior iov ir- ira irb irg iri iro irr irv iva ivb ivg ivi ivo ivr ivv iza izi izo izz o-i oaa oab oag oai oao oar oav ob- oba obb obg obi obo obr obv oga ogg ogi ogo oia oib oii oio oir oiv oiz oo- ooa oob oog ooi ooo oor oov or- ora orb org ori oro orr orv orz ov- ova ovb ovi ovo ovv oza ozo ozz ra- raa rab rag rai rao rar rav raz rba rbb rbg rbi rbo rbr rga rgb rgg rgi rgo rgr rgv ria rib rig rii rio rir riv riz roa rob rog roi roo ror rov roz rra rrb rrg rri rrr rva rvb rvg rvi rvo rvr rvv rza rzb rzo v-a vaa vab vag vai vao var vav vaz vba vbg vbi vbo vbr vbv vbz vga vgg vgo vgr vgz vi- via vib vig vii vio vir viv viz voa vob vog voi voo vor vov voz vra vrb vrg vri vrr vva vvb vvg vvi vvo vvr vvv vvz z-g zaa zab zag zai zao zar zav zaz zbb zbr zbv zgb zgg zgi zgv zia zib zig zio zir ziv ziz zo- zoa zob zog zoi zoo zor zro zvi zzr zzz