-er a-a aaa aae aan aao aar aau aax aea aee aen aeo aer aeu aex an- ana ane ann ano anr anu anx aoa aoe aon aoo aor aou aox ar- ara are arn aro arr aru arx au- aua aue aun auo aur aux ax- axa axe axn axo axr axx eaa eae ean eao ear eau eax eea eee een eeo eer eex en- ena ene enn eno enr enu eo- eoa eoe eon eoo eor eou era ere ern ero err eru eu- eua eue eun eur eux ex- exa exe exo exr exu exx naa nae nan nao nar nau nax ne- nea nee nen neo ner neu nex nna nne nnn nno nnu no- noa noe non noo nor nou nox nra nre nrn nro nrr nru nrx nua nue nun nuo nur nuu nux oaa oae oan oao oar oau oax oea oee oen oeo oer oex on- ona one onn ono onr onu onx oo- ooa oon ooo oor oox or- ora ore orn oro orr oru orx ou- oua oue oun ouo our ox- oxa oxn oxo oxx ra- raa rae ran rao rar rau rax re- rea ree ren reo rer reu rex rna rnn rno rnr rnu roa roe ron roo ror rou rox rra rrn rrr rru rua rue run ruo rur ruu rux rxr ua- uaa uae uan uao uar uau uea uee uen uer un- una une unn uno unr unu unx uoa uoe uon uoo uor uox ur- ura ure urn uro urr uru urx uua uue uun uur uuu uxo uxr uxu xaa xan xar xau xee xen xer xeu xex xna xno xnu xoa xon xoo xor xox xrx xue xun xxo xxx