-er a-a a-t aaa aae aag aao aar aat aax aea aee aeg aeo aer aet aex ag- aga age agg ago agr agt agx aoa aoe aog aoo aor aot aox ar- ara are arg aro arr art arx at- ata ate atg ato atr att atx ax- axa axe axo axr axt axx eaa eae eag eao ear eat eax eea eee eeg eeo eer eet eex ega ege egg ego egr egt egx eo- eoa eoe eog eoo eor eot era ere erg ero err ert eta ete etg eto etr ett etx ex- exa exe exo exr ext exx gaa gae gag gao gar gat ge- gea gee geg geo ger get gex gga ggg ggo ggr ggt goa goe gog goo gor got gox gra gre grg gro grr grt grx gta gte gtg gto gtr gtt gtx gxa gxt oaa oae oag oao oar oat oax oea oee oeg oeo oer oet oex oga oge ogg ogo ogt ogx oo- ooa oog ooo oor oot oox or- ora ore org oro orr ort orx ot- ota ote otg oto otr ott ox- oxa oxo oxt oxx ra- raa rae rag rao rar rat rax re- rea ree reg reo rer ret rex rga rge rgg rgo rgr rgt rgx roa roe rog roo ror rot rox rra rrg rrr rrt rta rte rtg rto rtr rtt rtx rxr t-x taa tae tag tao tar tat tax te- tea tee teg teo ter tet tex tga tge tgg tgo tgr tgt to- toa toe tog too tor tot tox tra tre trg tro trr trt trx tta tte ttg tto ttr ttt ttx txe txt xaa xag xar xat xee xeg xer xet xex xge xoa xog xoo xor xot xox xrt xrx xtr xtx xxo xxx