-er -ic bbb bbc bbe bbi bbn bbr bbs bcb bcc bce bci bcn bcr bcs be- beb bec bee bei ben ber bes bi- bib bic bie bii bin bir bis bnb bnc bne bni bnn bnr bns brb bre bri brn brr brs bsb bsc bse bsi bsn bsr bss c-- cbb cbc cbe cbi cbn cbr cbs ccb ccc cce cci ccn ccr ccs ce- ceb cec cee cei cen cer ces ci- cib cic cie cii cin cir cis cn- cnb cnc cne cni cnn cnr cns crb crc cre cri crn crr crs csb csc cse csi csn csr css ebb ebc ebe ebi ebn ebr ebs ec- ecb ecc ece eci ecn ecr ecs eeb eec eee een eer ees eib eic eie eii ein eir eis en- enb enc ene eni enn enr ens erb erc ere eri ern err ers es- esb esc ese esi esn esr ess ibb ibc ibe ibi ibn ibr ibs icb icc ice ici icn icr ics ie- iec iee iei ien ier ies iib iic iie iii iin iir iis in- inb inc ine ini inn inr ins ir- irb irc ire iri irn irr irs is- isb isc ise isi isn isr iss n-i nbb nbc nbe nbi nbn nbr nbs ncb ncc nce nci ncn ncr ncs ne- neb nec nee nei nen ner nes nib nic nie nii nin nir nis nnb nnc nne nni nnn nns nrb nrc nre nri nrn nrr nrs nsb nsc nse nsi nsn nsr nss rbb rbc rbe rbi rbn rbr rbs rcb rcc rce rci rcn rcr rcs re- reb rec ree rei ren rer res rib ric rie rii rin rir ris rnb rnc rni rnn rnr rns rrb rrc rri rrn rrr rrs rsb rsc rse rsi rsn rsr rss sbb sbc sbe sbi sbn sbr sbs scb scc sce sci scn scr scs se- seb sec see sei sen ser ses sib sic sie sii sin sir sis snb snc sne sni snn snr sns sr- srb src sre sri srn srr srs ss- ssb ssc sse ssi ssn ssr sss