-er a-a a-i aaa aae aag aai aap aar aas aea aee aeg aei aep aer aes ag- aga age agg agi agp agr ags ai- aia aie aig aii aip air ais ap- apa ape apg api app apr aps ar- ara are arg ari arp arr ars as- asa ase asg asi asp asr ass eaa eae eag eai eap ear eas eea eee eeg eep eer ees ega ege egg egi egp egr egs eia eie eig eii eip eir eis ep- epa epe epg epi epp epr eps era ere erg eri erp err ers es- esa ese esg esi esp esr ess g-p gaa gae gag gai gap gar gas ge- gea gee geg gei gep ger ges gga ggg ggi ggp ggr ggs gia gie gig gii gip gir gis gpa gpe gpg gpi gpp gpr gps gra gre grg gri grp grr grs gsa gse gsg gsi gsp gsr gss ia- iaa iae iag iai iap iar ias ie- iea iee ieg iei iep ier ies iga ige igg igi igp igr igs iia iie iii iip iir iis ipa ipe ipg ipi ipp ipr ips ir- ira ire irg iri irp irr irs is- isa ise isg isi isp isr iss p-p paa pae pag pai pap par pas pea pee peg pei pep per pes pga pge pgg pgi pgp pgr pgs pia pie pig pii pip pir pis ppa ppe ppg ppi ppp ppr pps pra pre prg pri prp prr prs ps- psa pse psg psi psp psr pss ra- raa rae rag rai rap rar ras re- rea ree reg rei rep rer res rga rge rgg rgi rgp rgr rgs ria rie rig rii rip rir ris rpa rpe rpg rpi rpp rpr rps rra rrg rri rrp rrr rrs rsa rse rsg rsi rsp rsr rss saa sae sag sai sap sar sas se- sea see seg sei sep ser ses sga sge sgg sgi sgp sgr sgs sia sie sig sii sip sir sis spa spe spg spi spp spr sps sr- sra sre srg sri srp srr srs ss- ssa sse ssg ssi ssp ssr sss