-er a-a aaa aae aao aar aas aau aax aea aee aeo aer aes aeu aex aoa aoe aoo aor aos aou aox ar- ara are aro arr ars aru arx as- asa ase aso asr ass asu asx au- aua aue auo aur aus aux ax- axa axe axo axr axs axx eaa eae eao ear eas eau eax eea eee eeo eer ees eex eo- eoa eoe eoo eor eos eou era ere ero err ers eru es- esa ese eso esr ess esu esx eu- eua eue eur eus eux ex- exa exe exo exr exs exu exx oaa oae oao oar oas oau oax oea oee oeo oer oes oex oo- ooa ooo oor oos oox or- ora ore oro orr ors oru orx os- osa ose oso osr oss osu osx ou- oua oue ouo our ous ox- oxa oxo oxx ra- raa rae rao rar ras rau rax re- rea ree reo rer res reu rex roa roe roo ror ros rou rox rra rrr rrs rru rsa rse rso rsr rss rsu rsx rua rue ruo rur rus ruu rux rxr rxs saa sae sao sar sas sau sax se- sea see seo ser ses seu sex soa soe soo sor sos sou sox sr- sra sre sro srr srs srx ss- ssa sse sso ssr sss ssu ssx sua sue suo sur sus suu sux sxs sxu ua- uaa uae uao uar uas uau uea uee uer ues uoa uoe uoo uor uos uox ur- ura ure uro urr urs uru urx usa use uso usr uss usu usx uua uue uur uus uuu uxo uxr uxu xaa xar xas xau xee xer xes xeu xex xoa xoo xor xos xox xrx xsa xss xue xus xxo xxx