a-a a-b a-i a-t aaa aab aag aai aan aao aar aat aav ab- aba abb abg abi abn abo abr abt abv ag- aga agb agg agi agn ago agr agt agv ai- aia aib aig aii ain aio air ait aiv an- ana anb ang ani ann ano anr ant anv aoa aob aog aoi aon aoo aor aot aov ar- ara arb arg ari arn aro arr art arv at- ata atb atg ati atn ato atr att atv av- ava avb avg avi avn avo avr avt baa bab bag bai ban bao bar bat bav bba bbb bbg bbi bbn bbo bbr bbt bga bgb bgg bgi bgn bgo bgr bgt bgv bi- bia bib big bii bin bio bir bit biv bna bnb bng bni bnn bno bnr bnt bnv boa bob bog boi bon boo bor bot bov bra brb brg bri brn bro brr brt brv bta btb btg bti btn bto btr btt btv bva bvb bvg bvi bvn bvo bvr bvt bvv gaa gab gag gai gan gao gar gat gav gba gbg gbi gbn gbo gbr gbt gbv gga ggb ggg ggi ggn ggo ggr ggt ggv gia gib gig gii gin gio gir git giv gna gnb gni gnn gno gnr gnt gnv goa gob gog goi gon goo gor got gov gra grb grg gri grn gro grr grt grv gta gtb gtg gti gtn gto gtr gtt gtv gva gvb gvg gvi gvn gvo gvr gvt i-v ia- iaa iab iag iai ian iao iar iat iav iba ibb ibg ibi ibn ibo ibr ibt ibv iga igb igg igi ign igo igr igt iia iib iii iin iio iir iit in- ina inb ing ini inn ino inr int inv io- ioa iob iog ioi ion ioo ior iot iov ir- ira irb irg iri irn iro irr irt irv ita itb itg iti itn ito itt itv iva ivb ivg ivi ivo ivr ivt ivv n-i naa nab nag nai nan nao nar nat nav nba nbb nbg nbi nbn nbo nbr nbt nbv nga ngb ngg ngi ngn ngo ngt nia nib nig nii nin nio nir nit niv nna nnb nng nni nnn nno nnt nnv no- noa nob nog noi non noo nor not nov nra nrb nrg nri nrn nro nrr nrt nrv nta ntb ntg nti ntn nto ntr ntt ntv nva nvb nvg nvi nvn nvt nvv o-i oaa oab oag oai oan oao oar oat oav ob- oba obb obg obi obn obo obr obt obv oga ogg ogi ogn ogo ogt oia oib oii oin oio oir oit oiv on- ona onb ong oni onn ono onr ont oo- ooa oob oog ooi oon ooo oor oot oov or- ora orb org ori orn oro orr ort orv ot- ota otb otg oti otn oto otr ott otv ov- ova ovb ovi ovo ovv ra- raa rab rag rai ran rao rar rat rav rba rbb rbg rbi rbn rbo rbr rbt rga rgb rgg rgi rgn rgo rgr rgt rgv ria rib rig rii rin rio rir rit riv rna rnb rng rni rnn rno rnr rnt rnv roa rob rog roi ron roo ror rot rov rra rrb rrg rri rrn rrr rrt rta rtb rtg rti rtn rto rtr rtt rtv rva rvb rvg rvi rvn rvo rvr rvt rvv taa tab tag tai tan tao tar tat tav tba tbb tbg tbi tbn tbo tbr tbt tbv tga tgb tgg tgi tgn tgo tgr tgt tgv tia tib tig tii tin tio tir tit tiv tna tnb tng tni tnn tno tnr tnt to- toa tob tog toi ton too tor tot tov tra trb trg tri trn tro trr trt trv tta ttb ttg tti ttn tto ttr ttt ttv tva tvb tvg tvi tvn tvo tvr tvt v-a vaa vab vag vai van vao var vat vav vba vbg vbi vbo vbr vbv vga vgg vgn vgo vgr vgt vi- via vib vig vii vin vio vir vit viv vn- vna vng vni vno vnr vnv voa vob vog voi von voo vor vot vov vra vrb vrg vri vrn vrr vrt vta vtb vtg vti vto vtr vtt vtv vva vvb vvg vvi vvo vvr vvt vvv