-er bbb bbe bbk bbn bbr bbs be- beb bee bek ben ber bes bjj bjk bjn bjr bjs bkb bke bkk bkn bkr bks bnb bne bnj bnk bnn bnr bns brb bre brj brk brn brr brs bsb bse bsj bsk bsn bsr bss ebb ebe ebj ebk ebn ebr ebs eeb eee eek een eer ees ekb eke ekr eks en- enb ene enk enn enr ens erb ere erk ern err ers es- esb ese esk esn esr ess jbj jbk jbr jbs jeb jee jej jek jen jer jes jjb jjj jjk jjr jjs jkb jkk jkn jkr jks jne jnj jnn jnr jns jrb jrk jrn jrr jrs jsb jse jsj jsk jsn jsr jss kbb kbe kbk kbn kbr kbs ke- keb kee kek ken ker kes kjb kje kjr kjs kkb kke kkk kkn kkr kks kn- kne knk knn knr krk krn krr krs ksb kse ksk ksn ksr kss nbb nbe nbk nbn nbr nbs ne- neb nee nej nek nen ner nes nje njk njn njs nke nkj nkk nkn nkr nks nnb nne nnk nnn nns nrb nre nrj nrk nrn nrr nrs nsb nse nsk nsn nsr nss rbb rbe rbk rbn rbr rbs re- reb ree rek ren rer res rjk rjr rkb rke rkk rks rnb rnn rnr rns rrb rrk rrn rrr rrs rsb rse rsj rsk rsn rsr rss sbb sbe sbj sbk sbn sbr sbs se- seb see sej sek sen ser ses sjb sje sjj sjk sjr sjs sk- skb ske skj skk skr sks snb sne snj snk snn snr sns sr- srb sre srj srk srn srr srs ss- ssb sse ssj ssk ssn ssr sss