-er -ic b-p bbb bbc bbd bbe bbi bbn bbp bbr bbs bcb bcc bcd bce bci bcn bcp bcr bcs bdb bdc bdd bde bdi bdp bdr bds be- beb bec bed bee bei ben bep ber bes bi- bib bic bid bie bii bin bip bir bis bnb bnc bnd bne bni bnn bnp bnr bns bpb bpc bpd bpe bpi bpn bpp bpr bps brb brd bre bri brn brp brr brs bsb bsc bsd bse bsi bsn bsp bsr bss c-- cbb cbc cbd cbe cbi cbn cbp cbr cbs ccb ccc ccd cce cci ccn ccp ccr ccs cdb cdc cdd cde cdi cdn cdp cdr cds ce- ceb cec ced cee cei cen cep cer ces ci- cib cic cid cie cii cin cip cir cis cn- cnb cnc cnd cne cni cnn cnp cnr cns cpb cpc cpd cpe cpi cpn cpp cpr cps crb crc crd cre cri crn crp crr crs csb csc csd cse csi csn csp csr css dbb dbc dbd dbe dbi dbn dbp dbr dbs dcb dcc dcd dce dci dcn dcp dcr dcs ddb ddc ddd dde ddi ddn ddp ddr dds de- deb dec ded dee dei den dep der des di- dib dic did die dii din dip dir dis dnb dnc dnd dne dni dnn dnp dnr dns dpb dpc dpd dpe dpi dpn dpp dpr dps drb drc drd dre dri drn drp drr drs dsb dsc dsd dse dsi dsn dsp dsr dss ebb ebc ebd ebe ebi ebn ebp ebr ebs ec- ecb ecc ecd ece eci ecn ecr ecs ed- edb edc edd ede edi edn edp edr eds eeb eec eed eee een eep eer ees eib eic eid eie eii ein eip eir eis en- enb enc end ene eni enn enp enr ens ep- epb epc epd epe epi epn epp epr eps erb erc erd ere eri ern erp err ers es- esb esc esd ese esi esn esp esr ess i-d ibb ibc ibd ibe ibi ibn ibp ibr ibs icb icc icd ice ici icn icp icr ics idb idc idd ide idi idn idp idr ids ie- iec ied iee iei ien iep ier ies iib iic iid iie iii iin iip iir iis in- inb inc ind ine ini inn inp inr ins ipb ipc ipd ipe ipi ipn ipp ipr ips ir- irb irc ird ire iri irn irp irr irs is- isb isc isd ise isi isn isp isr iss n-i nbb nbc nbd nbe nbi nbn nbp nbr nbs ncb ncc ncd nce nci ncn ncp ncr ncs ndb ndc ndd nde ndi ndn ndp ndr nds ne- neb nec ned nee nei nen nep ner nes nib nic nid nie nii nin nip nir nis nnb nnc nne nni nnn nnp nns npb npc npd npe npi npn npp npr nps nrb nrc nrd nre nri nrn nrp nrr nrs nsb nsc nsd nse nsi nsn nsp nsr nss p-p pbb pbc pbd pbe pbi pbn pbp pbr pbs pcb pcc pcd pce pci pcn pcp pcr pcs pdb pdc pdd pde pdi pdn pdp pdr pds peb pec ped pee pei pen pep per pes pib pic pid pie pii pin pip pir pis pn- pnb pnc pnd pne pni pnn pnp pnr pns ppb ppc ppd ppe ppi ppn ppp ppr pps prb prc prd pre pri prn prp prr prs ps- psb psc psd pse psi psn psp psr pss rbb rbc rbd rbe rbi rbn rbp rbr rbs rcb rcc rcd rce rci rcn rcp rcr rcs rdb rdc rdd rde rdi rdn rdp rdr rds re- reb rec red ree rei ren rep rer res rib ric rid rie rii rin rip rir ris rnb rnc rnd rni rnn rnp rnr rns rpb rpc rpd rpe rpi rpn rpp rpr rps rrb rrc rrd rri rrn rrp rrr rrs rsb rsc rsd rse rsi rsn rsp rsr rss sbb sbc sbd sbe sbi sbn sbp sbr sbs scb scc scd sce sci scn scp scr scs sdb sdc sdd sde sdi sdn sdp sdr sds se- seb sec sed see sei sen sep ser ses sib sic sid sie sii sin sip sir sis snb snc snd sne sni snn snp snr sns spb spc spd spe spi spn spp spr sps sr- srb src srd sre sri srn srp srr srs ss- ssb ssc ssd sse ssi ssn ssp ssr sss