-er b-p bbb bbe bbg bbl bbp bbr be- beb bee beg bel bep ber bgb bge bgg bgl bgp bgr blb ble blg bll blp blr bpb bpe bpg bpl bpp bpr brb bre brg brl brp brr ebb ebe ebg ebl ebp ebr eeb eee eeg eel eep eer egb ege egg egl egp egr elb ele elg ell elp elr ep- epb epe epg epl epp epr erb ere erg erl erp err g-p gbe gbg gbl gbp gbr ge- geb gee geg gel gep ger ggb ggg ggp ggr glb gle glg gll glp glr gpb gpe gpg gpl gpp gpr grb gre grg grl grp grr l-p lbb lbe lbg lbl lbp lbr leb lee leg lel lep ler lgb lge lgg lgl lgp lgr llb lle llg lll llp llr lpb lpe lpg lpl lpp lpr lrb lrg lrp lrr p-p pbb pbe pbg pbl pbp pbr peb pee peg pel pep per pgb pge pgg pgl pgp pgr plb ple plg pll plp plr ppb ppe ppg ppl ppp ppr prb pre prg prl prp prr rbb rbe rbg rbl rbp rbr re- reb ree reg rel rep rer rgb rge rgg rgp rgr rle rlg rll rlp rlr rpb rpe rpg rpl rpp rpr rrb rrg rrl rrp rrr