-er a-a a-b a-i aaa aab aae aag aai aam aao aar aav ab- aba abb abe abg abi abm abo abr abv aea aeb aee aeg aei aem aeo aer aev ag- aga agb age agg agi agm ago agr agv ai- aia aib aie aig aii aim aio air aiv ama amb ame amg ami amm amo amr amv aoa aob aoe aog aoi aom aoo aor aov ar- ara arb are arg ari arm aro arr arv av- ava avb ave avg avi avm avo avr baa bab bae bag bai bam bao bar bav bba bbb bbe bbg bbi bbm bbo bbr be- bea beb bee beg bei bem beo ber bev bga bgb bge bgg bgi bgm bgo bgr bgv bi- bia bib bie big bii bim bio bir biv bma bmb bme bmg bmi bmm bmo bmr bmv boa bob boe bog boi bom boo bor bov bra brb bre brg bri brm bro brr brv bva bvb bve bvg bvi bvm bvo bvr bvv eaa eab eae eag eai eam eao ear eav eba ebb ebe ebg ebi ebm ebo ebr ebv eea eeb eee eeg eem eeo eer eev ega egb ege egg egi egm ego egr eia eib eie eig eii eim eio eir eiv em- ema emb eme emg emi emm emo emr emv eo- eoa eob eoe eog eoi eom eoo eor era erb ere erg eri erm ero err erv eva evb eve evg evi evm evo evr evv gaa gab gae gag gai gam gao gar gav gba gbe gbg gbi gbm gbo gbr gbv ge- gea geb gee geg gei gem geo ger gev gga ggb ggg ggi ggm ggo ggr ggv gia gib gie gig gii gim gio gir giv gma gmb gme gmg gmi gmm gmo gmr gmv goa gob goe gog goi gom goo gor gov gra grb gre grg gri grm gro grr grv gva gvb gve gvg gvi gvm gvo gvr i-v ia- iaa iab iae iag iai iam iao iar iav iba ibb ibe ibg ibi ibm ibo ibr ibv ie- iea iee ieg iei iem ier iev iga igb ige igg igi igm igo igr iia iib iie iii iim iio iir im- ima imb ime img imi imm imo imv io- ioa iob ioe iog ioi iom ioo ior iov ir- ira irb ire irg iri irm iro irr irv iva ivb ive ivg ivi ivo ivr ivv m-o m-r m-v maa mab mae mag mai mam mao mar mav mba mbb mbe mbg mbi mbm mbo mbr mbv mea meb mee meg mei mem meo mer mev mga mgb mge mgi mgm mgo mgr mgv mi- mia mib mie mig mii mim mio mir miv mma mmb mme mmg mmi mmm mmo mmr mmv moa mob moe mog moi mom moo mor mov mra mrb mre mrg mri mrm mro mrr mrv mva mvb mve mvg mvi mvm mvo mvr mvv o-i oaa oab oae oag oai oam oao oar oav ob- oba obb obe obg obi obm obo obr obv oea oeb oee oeg oei oem oeo oer oga oge ogg ogi ogo oia oib oie oii oim oio oir oiv om- oma omb ome omg omi omm omo omr omv oo- ooa oob oog ooi oom ooo oor oov or- ora orb ore org ori orm oro orr orv ov- ova ovb ove ovi ovo ovv ra- raa rab rae rag rai ram rao rar rav rba rbb rbe rbg rbi rbm rbo rbr re- rea reb ree reg rei rem reo rer rev rga rgb rge rgg rgi rgo rgr rgv ria rib rie rig rii rim rio rir riv rma rmb rme rmg rmi rmm rmo rmr rmv roa rob roe rog roi rom roo ror rov rra rrb rrg rri rrm rrr rva rvb rve rvg rvi rvm rvo rvr rvv v-a v-e vaa vab vae vag vai vam vao var vav vba vbg vbi vbm vbo vbr vbv vea veb vee veg vei vem veo ver vga vgg vgm vgo vgr vi- via vib vie vig vii vim vio vir viv vm- vma vmi vmm vmo vmr voa vob voe vog voi vom voo vor vov vra vrb vre vrg vri vrm vrr vva vvb vvg vvi vvm vvo vvr vvv