-er a-a aaa aae aam aap aar aas aax aea aee aem aep aer aes aex ama ame amm amp amr ams amx ap- apa ape apm app apr aps apx ar- ara are arm arp arr ars arx as- asa ase asm asp asr ass asx ax- axa axe axm axp axr axs axx eaa eae eam eap ear eas eax eea eee eem eep eer ees eex em- ema eme emm emp emr ems emx ep- epa epe epm epp epr eps epx era ere erm erp err ers es- esa ese esm esp esr ess esx ex- exa exe exp exr exs exx m-r maa mae mam map mar mas max mea mee mem mep mer mes mex mma mme mmm mmp mmr mms mmx mpa mpe mpm mpp mpr mps mpx mra mre mrm mrp mrr mrs mrx msa mse msm msp msr mss msx mxa mxp mxr mxs p-p paa pae pam pap par pas pax pea pee pem pep per pes pex pma pme pmm pmp pmr pms pmx ppa ppe ppm ppp ppr pps ppx pra pre prm prp prr prs prx ps- psa pse psm psp psr pss psx pxe pxm pxr pxs ra- raa rae ram rap rar ras rax re- rea ree rem rep rer res rex rma rme rmm rmp rmr rms rmx rpa rpe rpm rpp rpr rps rpx rra rrm rrp rrr rrs rsa rse rsm rsp rsr rss rsx rxp rxr rxs saa sae sam sap sar sas sax se- sea see sem sep ser ses sex sma sme smm smp smr sms smx spa spe spm spp spr sps spx sr- sra sre srm srp srr srs srx ss- ssa sse ssm ssp ssr sss ssx sxm sxs xaa xam xap xar xas xee xem xep xer xes xex xma xmm xmp xmr xms xmx xpa xpe xpm xpp xps xrx xsa xsm xsp xss xxp xxx