-er b-p bbb bbd bbe bbl bbp bbr bdb bdd bde bdl bdp bdr be- beb bed bee bel bep ber blb bld ble bll blp blr bpb bpd bpe bpl bpp bpr brb brd bre brl brp brr dbb dbd dbe dbl dbp dbr ddb ddd dde ddl ddp ddr de- deb ded dee del dep der dl- dlb dld dle dll dlp dlr dpb dpd dpe dpl dpp dpr drb drd dre drl drp drr ebb ebd ebe ebl ebp ebr ed- edb edd ede edl edp edr eeb eed eee eel eep eer elb eld ele ell elp elr ep- epb epd epe epl epp epr erb erd ere erl erp err l-p lbb lbd lbe lbl lbp lbr ldb ldd lde ldl ldp ldr leb led lee lel lep ler llb lld lle lll llp llr lpb lpd lpe lpl lpp lpr lrb lrd lrp lrr p-p pbb pbd pbe pbl pbp pbr pdb pdd pde pdl pdp pdr peb ped pee pel pep per plb pld ple pll plp plr ppb ppd ppe ppl ppp ppr prb prd pre prl prp prr rbb rbd rbe rbl rbp rbr rdb rdd rde rdl rdp rdr re- reb red ree rel rep rer rld rle rll rlp rlr rpb rpd rpe rpl rpp rpr rrb rrd rrl rrp rrr