-er a-a aaa aad aae aag aap aar ad- ada add ade adg adp adr aea aed aee aeg aep aer ag- aga agd age agg agp agr ap- apa apd ape apg app apr ar- ara ard are arg arp arr daa dad dae dag dap dar dda ddd dde ddg ddp ddr de- dea ded dee deg dep der dga dgd dge dgg dgp dgr dpa dpd dpe dpg dpp dpr dra drd dre drg drp drr eaa ead eae eag eap ear ed- eda edd ede edg edp edr eea eed eee eeg eep eer ega egd ege egg egp egr ep- epa epd epe epg epp epr era erd ere erg erp err g-d g-p gaa gad gae gag gap gar gda gdd gde gdp gdr ge- gea ged gee geg gep ger gga ggd ggg ggp ggr gpa gpd gpe gpg gpp gpr gra grd gre grg grp grr p-p paa pad pae pag pap par pda pdd pde pdg pdp pdr pea ped pee peg pep per pga pgd pge pgg pgp pgr ppa ppd ppe ppg ppp ppr pra prd pre prg prp prr ra- raa rad rae rag rap rar rda rdd rde rdg rdp rdr re- rea red ree reg rep rer rga rgd rge rgg rgp rgr rpa rpd rpe rpg rpp rpr rra rrd rrg rrp rrr