-er -ic b-p bbb bbc bbe bbi bbl bbn bbp bbr bcb bcc bce bci bcl bcn bcp bcr be- beb bec bee bei bel ben bep ber bi- bib bic bie bii bil bin bip bir blb blc ble bli bll bln blp blr bnb bnc bne bni bnl bnn bnp bnr bpb bpc bpe bpi bpl bpn bpp bpr brb bre bri brl brn brp brr c-- cbb cbc cbe cbi cbl cbn cbp cbr ccb ccc cce cci ccl ccn ccp ccr ce- ceb cec cee cei cel cen cep cer ci- cib cic cie cii cil cin cip cir cl- clb clc cle cli cll cln clp clr cn- cnb cnc cne cni cnl cnn cnp cnr cpb cpc cpe cpi cpl cpn cpp cpr crb crc cre cri crl crn crp crr ebb ebc ebe ebi ebl ebn ebp ebr ec- ecb ecc ece eci ecl ecn ecr eeb eec eee eel een eep eer eib eic eie eii eil ein eip eir elb elc ele eli ell eln elp elr en- enb enc ene eni enl enn enp enr ep- epb epc epe epi epl epn epp epr erb erc ere eri erl ern erp err ibb ibc ibe ibi ibl ibn ibp ibr icb icc ice ici icl icn icp icr ie- iec iee iei iel ien iep ier iib iic iie iii iil iin iip iir il- ilb ilc ile ili ill iln ilp ilr in- inb inc ine ini inl inn inp inr ipb ipc ipe ipi ipl ipn ipp ipr ir- irb irc ire iri irl irn irp irr l-p lbb lbc lbe lbi lbl lbp lbr lcb lcc lce lci lcl lcn lcp lcr leb lec lee lei lel len lep ler lib lic lie lii lil lin lip lir llb llc lle lli lll lln llp llr lnb lnc lne lni lnl lnn lnp lnr lpb lpc lpe lpi lpl lpn lpp lpr lrb lrc lri lrn lrp lrr n-i nbb nbc nbe nbi nbl nbn nbp nbr ncb ncc nce nci ncl ncn ncp ncr ne- neb nec nee nei nel nen nep ner nib nic nie nii nil nin nip nir nlb nlc nle nli nll nln nlp nlr nnb nnc nne nni nnl nnn nnp npb npc npe npi npl npn npp npr nrb nrc nre nri nrl nrn nrp nrr p-p pbb pbc pbe pbi pbl pbn pbp pbr pcb pcc pce pci pcl pcn pcp pcr peb pec pee pei pel pen pep per pib pic pie pii pil pin pip pir plb plc ple pli pll pln plp plr pn- pnb pnc pne pni pnl pnn pnp pnr ppb ppc ppe ppi ppl ppn ppp ppr prb prc pre pri prl prn prp prr rbb rbc rbe rbi rbl rbn rbp rbr rcb rcc rce rci rcl rcn rcp rcr re- reb rec ree rei rel ren rep rer rib ric rie rii ril rin rip rir rlc rle rli rll rln rlp rlr rnb rnc rni rnn rnp rnr rpb rpc rpe rpi rpl rpn rpp rpr rrb rrc rri rrl rrn rrp rrr