-er a-a a-i aaa aae aai aak aap aar aas aea aee aei aek aep aer aes ai- aia aie aii aik aip air ais aka ake aki akk akp akr aks ap- apa ape api apk app apr aps ar- ara are ari ark arp arr ars as- asa ase asi ask asp asr ass eaa eae eai eak eap ear eas eea eee eek eep eer ees eia eie eii eik eip eir eis eka eke eki ekp ekr eks ep- epa epe epi epp epr eps era ere eri erk erp err ers es- esa ese esi esk esp esr ess ia- iaa iae iai iap iar ias ie- iea iee iei iek iep ier ies iia iie iii iip iir iis ika ike iki ikk ikr iks ipa ipe ipi ipp ipr ips ir- ira ire iri irk irp irr irs is- isa ise isi isk isp isr iss ka- kaa kae kai kak kap kar kas ke- kea kee kei kek kep ker kes kia kie kii kik kip kir kis kke kki kkk kkp kkr kks kpa kpe kpi kpk kpp kpr kps kra kri krk krp krr krs ksa kse ksi ksk ksp ksr kss p-p paa pae pai pak pap par pas pea pee pei pek pep per pes pia pie pii pik pip pir pis pka pke pki pkp pkr pks ppa ppe ppi ppk ppp ppr pps pra pre pri prk prp prr prs ps- psa pse psi psk psp psr pss ra- raa rae rai rak rap rar ras re- rea ree rei rek rep rer res ria rie rii rik rip rir ris rke rkk rkp rks rpa rpe rpi rpk rpp rpr rps rra rri rrk rrp rrr rrs rsa rse rsi rsk rsp rsr rss saa sae sai sak sap sar sas se- sea see sei sek sep ser ses sia sie sii sik sip sir sis sk- ska ske ski skk skp skr sks spa spe spi spk spp spr sps sr- sra sre sri srk srp srr srs ss- ssa sse ssi ssk ssp ssr sss