-er -ic bbb bbc bbe bbi bbk bbl bbn bbr bcb bcc bce bci bck bcl bcn bcr be- beb bec bee bei bek bel ben ber bi- bib bic bie bii bik bil bin bir bkb bkc bke bkk bkl bkn bkr blb blc ble bli blk bll bln blr bnb bnc bne bni bnk bnl bnn bnr brb bre bri brk brl brn brr c-- cbb cbc cbe cbi cbk cbl cbn cbr ccb ccc cce cci cck ccl ccn ccr ce- ceb cec cee cei cek cel cen cer ci- cib cic cie cii cik cil cin cir ckb ckc cki cl- clb clc cle cli clk cll cln clr cn- cnb cnc cne cni cnl cnn cnr crb crc cre cri crk crl crn crr ebb ebc ebe ebi ebk ebl ebn ebr ec- ecb ecc ece eci eck ecl ecn ecr eeb eec eee eek eel een eer eib eic eie eii eik eil ein eir ekb ekc eke eki ekl ekr elb elc ele eli elk ell eln elr en- enb enc ene eni enk enl enn enr erb erc ere eri erk erl ern err ibb ibc ibe ibi ibk ibl ibn ibr icb icc ice ici ick icl icn icr ie- iec iee iei iek iel ien ier iib iic iie iii iil iin iir ikb ikc ike iki ikk ikl ikr il- ilb ilc ile ili ilk ill iln ilr in- inb inc ine ini ink inl inn inr ir- irb irc ire iri irk irl irn irr kbb kbc kbe kbi kbk kbl kbn kbr kcb kcc kce kci kck kcl kcn kcr ke- keb kec kee kei kek kel ken ker kib kic kie kii kik kil kin kir kkb kkc kke kki kkk kkl kkn kkr kl- klb klc kli klr kn- knc kne kni knk knl knn knr krc kri krk krl krn krr lbb lbc lbe lbi lbk lbl lbr lcb lcc lce lci lck lcl lcn lcr leb lec lee lei lek lel len ler lib lic lie lii lik lil lin lir lkb lkl lkr llb llc lle lli llk lll lln llr lnb lnc lne lni lnk lnl lnn lnr lrb lrc lri lrk lrn lrr n-i nbb nbc nbe nbi nbk nbl nbn nbr ncb ncc nce nci nck ncl ncn ncr ne- neb nec nee nei nek nel nen ner nib nic nie nii nik nil nin nir nkc nke nki nkk nkn nkr nlb nlc nle nli nlk nll nln nlr nnb nnc nne nni nnk nnl nnn nrb nrc nre nri nrk nrl nrn nrr rbb rbc rbe rbi rbk rbl rbn rbr rcb rcc rce rci rcl rcn rcr re- reb rec ree rei rek rel ren rer rib ric rie rii rik ril rin rir rkb rkc rke rkk rlc rle rli rll rln rlr rnb rnc rni rnn rnr rrb rrc rri rrk rrl rrn rrr