-er bbb bbc bbe bbh bbk bbn bbr bbs bcb bcc bce bch bck bcn bcr bcs be- beb bec bee beh bek ben ber bes bhb bhc bhe bhh bhk bhr bhs bkb bkc bke bkk bkn bkr bks bnb bnc bne bnk bnn bnr bns brb bre brh brk brn brr brs bsb bsc bse bsh bsk bsn bsr bss c-- cbb cbc cbe cbh cbk cbn cbr cbs ccb ccc cce cch cck ccn ccr ccs ce- ceb cec cee ceh cek cen cer ces ch- chb chc che chh chk chn chr chs ckb ckc ckh cks cn- cnb cnc cne cnh cnn cnr cns crb crc cre crh crk crn crr crs csb csc cse csh csk csn csr css ebb ebc ebe ebh ebk ebn ebr ebs ec- ecb ecc ece ech eck ecn ecr ecs eeb eec eee eek een eer ees ehb ehc ehe ehh ehn ehr ehs ekb ekc eke ekh ekr eks en- enb enc ene enh enk enn enr ens erb erc ere erh erk ern err ers es- esb esc ese esh esk esn esr ess hbb hbc hbe hbh hbk hbn hbr hbs hcb hcc hce hch hck hcn hcr hcs he- heb hec hee heh hek hen her hes hhb hhc hhe hhh hhk hhn hhr hhs hkb hkh hkk hkn hkr hks hnb hnc hne hnh hnk hnn hns hr- hrb hrc hre hrh hrk hrn hrr hrs hsb hsc hse hsh hsk hsn hsr hss kbb kbc kbe kbh kbk kbn kbr kbs kcb kcc kce kch kck kcn kcr kcs ke- keb kec kee keh kek ken ker kes khe khh khk khn khr khs kkb kkc kke kkh kkk kkn kkr kks kn- knc kne knk knn knr krc krk krn krr krs ksb ksc kse ksh ksk ksn ksr kss nbb nbc nbe nbk nbn nbr nbs ncb ncc nce nch nck ncn ncr ncs ne- neb nec nee neh nek nen ner nes nhb nhc nhe nhh nhk nhn nhr nhs nkc nke nkk nkn nkr nks nnb nnc nne nnh nnk nnn nns nrb nrc nre nrk nrn nrr nrs nsb nsc nse nsh nsk nsn nsr nss rbb rbc rbe rbh rbk rbn rbr rbs rcb rcc rce rch rcn rcr rcs re- reb rec ree reh rek ren rer res rh- rhb rhc rhe rhh rhn rhr rhs rkb rkc rke rkk rks rnb rnc rnh rnn rnr rns rrb rrc rrh rrk rrn rrr rrs rsb rsc rse rsh rsk rsn rsr rss sbb sbc sbe sbh sbk sbn sbr sbs scb scc sce sch sck scn scr scs se- seb sec see seh sek sen ser ses sh- shb shc she shh shk shn shr shs sk- skb skc ske skh skk skr sks snb snc sne snk snn snr sns sr- srb src sre srh srk srn srr srs ss- ssb ssc sse ssh ssk ssn ssr sss