-er a-a aaa aad aae aap aar aas aax ad- ada add ade adp adr ads adx aea aed aee aep aer aes aex ap- apa apd ape app apr aps apx ar- ara ard are arp arr ars arx as- asa asd ase asp asr ass asx ax- axa axe axp axr axs axx daa dad dae dap dar das dax dda ddd dde ddp ddr dds ddx de- dea ded dee dep der des dex dpa dpd dpe dpp dpr dps dra drd dre drp drr drs drx dsa dsd dse dsp dsr dss dsx dxd dxp dxr dxs dxx eaa ead eae eap ear eas eax ed- eda edd ede edp edr eds edx eea eed eee eep eer ees eex ep- epa epd epe epp epr eps epx era erd ere erp err ers es- esa esd ese esp esr ess esx ex- exa exd exe exp exr exs exx p-p paa pad pae pap par pas pax pda pdd pde pdp pdr pds pdx pea ped pee pep per pes pex ppa ppd ppe ppp ppr pps ppx pra prd pre prp prr prs prx ps- psa psd pse psp psr pss psx pxe pxr pxs ra- raa rad rae rap rar ras rax rda rdd rde rdp rdr rds rdx re- rea red ree rep rer res rex rpa rpd rpe rpp rpr rps rpx rra rrd rrp rrr rrs rsa rsd rse rsp rsr rss rsx rxp rxr rxs saa sad sae sap sar sas sax sda sdd sde sdp sdr sds se- sea sed see sep ser ses sex spa spd spe spp spr sps spx sr- sra srd sre srp srr srs srx ss- ssa ssd sse ssp ssr sss ssx sxs xaa xad xap xar xas xda xde xdr xds xed xee xep xer xes xex xpa xpd xpe xpp xps xrd xrx xsa xsp xss xxp xxx