-er b-p bbb bbe bbi bbl bbp bbr be- beb bee bei bel bep ber bi- bib bie bii bil bip bir blb ble bli bll blp blr bpb bpe bpi bpl bpp bpr brb bre bri brl brp brr ebb ebe ebi ebl ebp ebr eeb eee eel eep eer eib eie eii eil eip eir elb ele eli ell elp elr ep- epb epe epi epl epp epr erb ere eri erl erp err ibb ibe ibi ibl ibp ibr ie- iee iei iel iep ier iib iie iii iil iip iir il- ilb ile ili ill ilp ilr ipb ipe ipi ipl ipp ipr ir- irb ire iri irl irp irr l-p lbb lbe lbi lbl lbp lbr leb lee lei lel lep ler lib lie lii lil lip lir llb lle lli lll llp llr lpb lpe lpi lpl lpp lpr lrb lri lrp lrr p-p pbb pbe pbi pbl pbp pbr peb pee pei pel pep per pib pie pii pil pip pir plb ple pli pll plp plr ppb ppe ppi ppl ppp ppr prb pre pri prl prp prr rbb rbe rbi rbl rbp rbr re- reb ree rei rel rep rer rib rie rii ril rip rir rle rli rll rlp rlr rpb rpe rpi rpl rpp rpr rrb rri rrl rrp rrr