-er -up a-a aaa aae aao aap aar aas aau aax aea aee aeo aep aer aes aeu aex aoa aoe aoo aop aor aos aou aox ap- apa ape apo app apr aps apu apx ar- ara are aro arp arr ars aru arx as- asa ase aso asp asr ass asu asx au- aua aue auo aup aur aus aux ax- axa axe axo axp axr axs axx eaa eae eao eap ear eas eau eax eea eee eeo eep eer ees eex eo- eoa eoe eoo eop eor eos eou ep- epa epe epo epp epr eps epu epx era ere ero erp err ers eru es- esa ese eso esp esr ess esu esx eu- eua eue eup eur eus eux ex- exa exe exo exp exr exs exu exx oaa oae oao oap oar oas oau oax oea oee oeo oep oer oes oex oo- ooa ooo oop oor oos oox op- opa ope opo opp opr ops opx or- ora ore oro orp orr ors oru orx os- osa ose oso osp osr oss osu osx ou- oua oue ouo oup our ous ox- oxa oxo oxx p-p paa pae pao pap par pas pau pax pea pee peo pep per pes peu pex poa poe poo pop por pos pou pox ppa ppe ppo ppp ppr pps ppu ppx pra pre pro prp prr prs pru prx ps- psa pse pso psp psr pss psu psx pua pue pup pur pus puu pxe pxr pxs ra- raa rae rao rap rar ras rau rax re- rea ree reo rep rer res reu rex roa roe roo rop ror ros rou rox rpa rpe rpo rpp rpr rps rpu rpx rra rrp rrr rrs rru rsa rse rso rsp rsr rss rsu rsx rua rue ruo rup rur rus ruu rux rxp rxr rxs saa sae sao sap sar sas sau sax se- sea see seo sep ser ses seu sex soa soe soo sop sor sos sou sox spa spe spo spp spr sps spu spx sr- sra sre sro srp srr srs srx ss- ssa sse sso ssp ssr sss ssu ssx sua sue suo sup sur sus suu sux sxs sxu ua- uaa uae uao uap uar uas uau uea uee uep uer ues uoa uoe uoo uop uor uos uox up- upa upe upo upp upr ups upu upx ur- ura ure uro urp urr urs uru urx usa use uso usp usr uss usu usx uua uue uur uus uuu uxo uxr uxu xaa xap xar xas xau xee xep xer xes xeu xex xoa xoo xop xor xos xox xpa xpe xpo xpp xps xrx xsa xsp xss xue xup xus xxo xxp xxx