-er b-p bbb bbe bbl bbp bbr be- beb bee bel bep ber blb ble bll blp blr bpb bpe bpl bpp bpr brb bre brl brp brr ebb ebe ebl ebp ebr eeb eee eel eep eer elb ele ell elp elr ep- epb epe epl epp epr erb ere erl erp err l-p lbb lbe lbl lbp lbr leb lee lel lep ler llb lle lll llp llr lpb lpe lpl lpp lpr lrb lrp lrr p-p pbb pbe pbl pbp pbr peb pee pel pep per plb ple pll plp plr ppb ppe ppl ppp ppr prb pre prl prp prr rbb rbe rbl rbp rbr re- reb ree rel rep rer rle rll rlp rlr rpb rpe rpl rpp rpr rrb rrl rrp rrr