-er -ic bbb bbc bbd bbe bbi bbn bbr bbs bcb bcc bcd bce bci bcn bcr bcs bdb bdc bdd bde bdi bdr bds be- beb bec bed bee bei ben ber bes bi- bib bic bid bie bii bin bir bis bnb bnc bnd bne bni bnn bnr bns brb brd bre bri brn brr brs bsb bsc bsd bse bsi bsn bsr bss c-- cbb cbc cbd cbe cbi cbn cbr cbs ccb ccc ccd cce cci ccn ccr ccs cdb cdc cdd cde cdi cdn cdr cds ce- ceb cec ced cee cei cen cer ces ci- cib cic cid cie cii cin cir cis cn- cnb cnc cnd cne cni cnn cnr cns crb crc crd cre cri crn crr crs csb csc csd cse csi csn csr css dbb dbc dbd dbe dbi dbn dbr dbs dcb dcc dcd dce dci dcn dcr dcs ddb ddc ddd dde ddi ddn ddr dds de- deb dec ded dee dei den der des di- dib dic did die dii din dir dis dnb dnc dnd dne dni dnn dnr dns drb drc drd dre dri drn drr drs dsb dsc dsd dse dsi dsn dsr dss ebb ebc ebd ebe ebi ebn ebr ebs ec- ecb ecc ecd ece eci ecn ecr ecs ed- edb edc edd ede edi edn edr eds eeb eec eed eee een eer ees eib eic eid eie eii ein eir eis en- enb enc end ene eni enn enr ens erb erc erd ere eri ern err ers es- esb esc esd ese esi esn esr ess i-d ibb ibc ibd ibe ibi ibn ibr ibs icb icc icd ice ici icn icr ics idb idc idd ide idi idn idr ids ie- iec ied iee iei ien ier ies iib iic iid iie iii iin iir iis in- inb inc ind ine ini inn inr ins ir- irb irc ird ire iri irn irr irs is- isb isc isd ise isi isn isr iss n-i nbb nbc nbd nbe nbi nbn nbr nbs ncb ncc ncd nce nci ncn ncr ncs ndb ndc ndd nde ndi ndn ndr nds ne- neb nec ned nee nei nen ner nes nib nic nid nie nii nin nir nis nnb nnc nne nni nnn nns nrb nrc nrd nre nri nrn nrr nrs nsb nsc nsd nse nsi nsn nsr nss rbb rbc rbd rbe rbi rbn rbr rbs rcb rcc rcd rce rci rcn rcr rcs rdb rdc rdd rde rdi rdn rdr rds re- reb rec red ree rei ren rer res rib ric rid rie rii rin rir ris rnb rnc rnd rni rnn rnr rns rrb rrc rrd rri rrn rrr rrs rsb rsc rsd rse rsi rsn rsr rss sbb sbc sbd sbe sbi sbn sbr sbs scb scc scd sce sci scn scr scs sdb sdc sdd sde sdi sdn sdr sds se- seb sec sed see sei sen ser ses sib sic sid sie sii sin sir sis snb snc snd sne sni snn snr sns sr- srb src srd sre sri srn srr srs ss- ssb ssc ssd sse ssi ssn ssr sss