-er a-a aaa aae aag aan aao aar aax aea aee aeg aen aeo aer aex ag- aga age agg agn ago agr agx an- ana ane ang ann ano anr anx aoa aoe aog aon aoo aor aox ar- ara are arg arn aro arr arx ax- axa axe axn axo axr axx eaa eae eag ean eao ear eax eea eee eeg een eeo eer eex ega ege egg egn ego egr egx en- ena ene eng enn eno enr eo- eoa eoe eog eon eoo eor era ere erg ern ero err ex- exa exe exo exr exx gaa gae gag gan gao gar ge- gea gee geg gen geo ger gex gga ggg ggn ggo ggr gna gne gnn gno gnr goa goe gog gon goo gor gox gra gre grg grn gro grr grx gxa naa nae nag nan nao nar nax ne- nea nee neg nen neo ner nex nga nge ngg ngn ngo nna nne nng nnn nno no- noa noe nog non noo nor nox nra nre nrg nrn nro nrr nrx oaa oae oag oan oao oar oax oea oee oeg oen oeo oer oex oga oge ogg ogn ogo ogx on- ona one ong onn ono onr onx oo- ooa oog oon ooo oor oox or- ora ore org orn oro orr orx ox- oxa oxn oxo oxx ra- raa rae rag ran rao rar rax re- rea ree reg ren reo rer rex rga rge rgg rgn rgo rgr rgx rna rng rnn rno rnr roa roe rog ron roo ror rox rra rrg rrn rrr rxr xaa xag xan xar xee xeg xen xer xex xge xna xno xoa xog xon xoo xor xox xrx xxo xxx