-er a-a aaa aae aag aan aar aau aav aax aea aee aeg aen aer aeu aev aex ag- aga age agg agn agr agu agv agx an- ana ane ang ann anr anu anv anx ar- ara are arg arn arr aru arv arx au- aua aue aug aun aur auv aux av- ava ave avg avn avr avu avx ax- axa axe axn axr axv axx eaa eae eag ean ear eau eav eax eea eee eeg een eer eev eex ega ege egg egn egr egu egx en- ena ene eng enn enr enu env era ere erg ern err eru erv eu- eua eue eug eun eur euv eux eva eve evg evn evr evv ex- exa exe exr exu exx gaa gae gag gan gar gau gav ge- gea gee geg gen ger geu gev gex gga ggg ggn ggr ggu ggv gna gne gnn gnr gnu gnv gra gre grg grn grr gru grv grx gu- gua gue gug gun gur guu guv gva gve gvg gvn gvr gvu gxa naa nae nag nan nar nau nav nax ne- nea nee neg nen ner neu nev nex nga nge ngg ngn ngu nna nne nng nnn nnu nnv nra nre nrg nrn nrr nru nrv nrx nua nue nug nun nur nuu nuv nux nva nve nvg nvn nvu nvv nxv ra- raa rae rag ran rar rau rav rax re- rea ree reg ren rer reu rev rex rga rge rgg rgn rgr rgv rgx rna rng rnn rnr rnu rnv rra rrg rrn rrr rru rua rue rug run rur ruu ruv rux rva rve rvg rvn rvr rvu rvv rxr ua- uaa uae uag uan uar uau uav uea uee ueg uen uer uga uge ugg ugn ugr ugu ugx un- una une ung unn unr unu unv unx ur- ura ure urg urn urr uru urx uua uue uug uun uur uuu uva uve uvu uvv uxr uxu v-a v-e vaa vae vag van var vau vav vax vea vee veg ven ver veu vex vga vgg vgn vgr vgu vgx vn- vna vng vnr vnu vnv vra vre vrg vrn vrr vru vue vug vur vuv vva vvg vvr vvv vxa vxr vxv xaa xag xan xar xau xav xee xeg xen xer xeu xev xex xge xna xnu xrx xue xun xuv xvg xxv xxx