-er a-a a-b aaa aab aae aag aap aar aav ab- aba abb abe abg abp abr abv aea aeb aee aeg aep aer aev ag- aga agb age agg agp agr agv ap- apa apb ape apg app apr apv ar- ara arb are arg arp arr arv av- ava avb ave avg avp avr b-p baa bab bae bag bap bar bav bba bbb bbe bbg bbp bbr be- bea beb bee beg bep ber bev bga bgb bge bgg bgp bgr bgv bpa bpb bpe bpg bpp bpr bpv bra brb bre brg brp brr brv bva bvb bve bvg bvp bvr bvv eaa eab eae eag eap ear eav eba ebb ebe ebg ebp ebr ebv eea eeb eee eeg eep eer eev ega egb ege egg egp egr ep- epa epb epe epg epp epr era erb ere erg erp err erv eva evb eve evg evp evr evv g-p gaa gab gae gag gap gar gav gba gbe gbg gbp gbr gbv ge- gea geb gee geg gep ger gev gga ggb ggg ggp ggr ggv gpa gpb gpe gpg gpp gpr gra grb gre grg grp grr grv gva gvb gve gvg gvp gvr p-p paa pab pae pag pap par pav pba pbb pbe pbg pbp pbr pea peb pee peg pep per pev pga pgb pge pgg pgp pgr pgv ppa ppb ppe ppg ppp ppr ppv pra prb pre prg prp prr prv pva pvb pve pvg pvp pvr pvv ra- raa rab rae rag rap rar rav rba rbb rbe rbg rbp rbr re- rea reb ree reg rep rer rev rga rgb rge rgg rgp rgr rgv rpa rpb rpe rpg rpp rpr rpv rra rrb rrg rrp rrr rva rvb rve rvg rvp rvr rvv v-a v-e vaa vab vae vag vap var vav vba vbg vbr vbv vea veb vee veg vep ver vga vgg vgp vgr vpa vpb vpe vpg vpp vpr vra vrb vre vrg vrp vrr vva vvb vvg vvr vvv