a-a aaa aae aao aap aas aax aea aee aeo aep aes aex aoa aoe aoo aop aos aox ap- apa ape apo app aps apx as- asa ase aso asp ass asx ax- axa axe axo axp axs axx eaa eae eao eap eas eax eea eee eeo eep ees eex eo- eoa eoe eoo eop eos ep- epa epe epo epp eps epx es- esa ese eso esp ess esx ex- exa exe exo exp exs exx oaa oae oao oap oas oax oea oee oeo oep oes oex oo- ooa ooo oop oos oox op- opa ope opo opp ops opx os- osa ose oso osp oss osx ox- oxa oxo oxx p-p paa pae pao pap pas pax pea pee peo pep pes pex poa poe poo pop pos pox ppa ppe ppo ppp pps ppx ps- psa pse pso psp pss psx pxe pxs saa sae sao sap sas sax se- sea see seo sep ses sex soa soe soo sop sos sox spa spe spo spp sps spx ss- ssa sse sso ssp sss ssx sxs xaa xap xas xee xep xes xex xoa xoo xop xos xox xpa xpe xpo xpp xps xsa xsp xss xxo xxp xxx