-er -up a-a aaa aae aao aap aar aau aax aea aee aeo aep aer aeu aex aoa aoe aoo aop aor aou aox ap- apa ape apo app apr apu apx ar- ara are aro arp arr aru arx au- aua aue auo aup aur aux ax- axa axe axo axp axr axx eaa eae eao eap ear eau eax eea eee eeo eep eer eex eo- eoa eoe eoo eop eor eou ep- epa epe epo epp epr epu epx era ere ero erp err eru eu- eua eue eup eur eux ex- exa exe exo exp exr exu exx oaa oae oao oap oar oau oax oea oee oeo oep oer oex oo- ooa ooo oop oor oox op- opa ope opo opp opr opx or- ora ore oro orp orr oru orx ou- oua oue ouo oup our ox- oxa oxo oxx p-p paa pae pao pap par pau pax pea pee peo pep per peu pex poa poe poo pop por pou pox ppa ppe ppo ppp ppr ppu ppx pra pre pro prp prr pru prx pua pue pup pur puu pxe pxr ra- raa rae rao rap rar rau rax re- rea ree reo rep rer reu rex roa roe roo rop ror rou rox rpa rpe rpo rpp rpr rpu rpx rra rrp rrr rru rua rue ruo rup rur ruu rux rxp rxr ua- uaa uae uao uap uar uau uea uee uep uer uoa uoe uoo uop uor uox up- upa upe upo upp upr upu upx ur- ura ure uro urp urr uru urx uua uue uur uuu uxo uxr uxu xaa xap xar xau xee xep xer xeu xex xoa xoo xop xor xox xpa xpe xpo xpp xrx xue xup xxo xxp xxx