-er a-a a-i aaa aae aai aar aas aea aee aei aer aes ai- aia aie aii air ais ar- ara are ari arr ars as- asa ase asi asr ass eaa eae eai ear eas eea eee eer ees eia eie eii eir eis era ere eri err ers es- esa ese esi esr ess ia- iaa iae iai iar ias ie- iea iee iei ier ies iia iie iii iir iis ir- ira ire iri irr irs is- isa ise isi isr iss ra- raa rae rai rar ras re- rea ree rei rer res ria rie rii rir ris rra rri rrr rrs rsa rse rsi rsr rss saa sae sai sar sas se- sea see sei ser ses sia sie sii sir sis sr- sra sre sri srr srs ss- ssa sse ssi ssr sss