-er a-a aaa aae aaf aar aas aea aee aef aer aes af- afa afe aff afr afs ar- ara are arf arr ars as- asa ase asf asr ass eaa eae eaf ear eas eea eee eef eer ees ef- efa efe eff efr efs era ere erf err ers es- esa ese esf esr ess faa fae faf far fas fea fee fef fer fes ffa ffe fff ffr ffs fra fre frf frr frs fsa fse fsf fsr fss ra- raa rae raf rar ras re- rea ree ref rer res rfa rfe rff rfr rfs rra rrf rrr rrs rsa rse rsf rsr rss saa sae saf sar sas se- sea see sef ser ses sfa sfe sff sfr sfs sr- sra sre srf srr srs ss- ssa sse ssf ssr sss