-er bbb bbc bbe bbh bbm bbn bbr bbs bcb bcc bce bch bcm bcn bcr bcs be- beb bec bee beh bem ben ber bes bhb bhc bhe bhh bhm bhr bhs bmb bmc bme bmh bmm bmn bmr bms bnb bnc bne bnn bnr bns brb bre brh brm brn brr brs bsb bsc bse bsh bsm bsn bsr bss c-- cbb cbc cbe cbh cbm cbn cbr cbs ccb ccc cce cch ccm ccn ccr ccs ce- ceb cec cee ceh cem cen cer ces ch- chb chc che chh chm chn chr chs cmb cmc cme cmh cmm cmn cmr cms cn- cnb cnc cne cnh cnm cnn cnr cns crb crc cre crh crm crn crr crs csb csc cse csh csm csn csr css ebb ebc ebe ebh ebm ebn ebr ebs ec- ecb ecc ece ech ecm ecn ecr ecs eeb eec eee eem een eer ees ehb ehc ehe ehh ehm ehn ehr ehs em- emb emc eme emh emm emn emr ems en- enb enc ene enh enm enn enr ens erb erc ere erh erm ern err ers es- esb esc ese esh esm esn esr ess hbb hbc hbe hbh hbm hbn hbr hbs hcb hcc hce hch hcm hcn hcr hcs he- heb hec hee heh hem hen her hes hhb hhc hhe hhh hhm hhn hhr hhs hmb hmc hme hmh hmm hmr hms hnb hnc hne hnh hnn hns hr- hrb hrc hre hrh hrm hrn hrr hrs hsb hsc hse hsh hsm hsn hsr hss m-r mbb mbc mbe mbh mbm mbr mbs mc- mcb mcc mce mch mcm mcn mcr mcs meb mec mee meh mem men mer mes mhc mhh mhm mhn mhr mhs mmb mmc mme mmh mmm mmn mmr mms mnb mnc mne mnm mnn mnr mns mrb mrc mre mrh mrm mrn mrr mrs msb msc mse msh msm msn msr mss nbb nbc nbe nbm nbn nbr nbs ncb ncc nce nch ncm ncn ncr ncs ne- neb nec nee neh nem nen ner nes nhb nhc nhe nhh nhm nhn nhr nhs nmb nmc nme nmh nmm nmn nmr nms nnb nnc nne nnh nnm nnn nns nrb nrc nre nrm nrn nrr nrs nsb nsc nse nsh nsm nsn nsr nss rbb rbc rbe rbh rbm rbn rbr rbs rcb rcc rce rch rcm rcn rcr rcs re- reb rec ree reh rem ren rer res rh- rhb rhc rhe rhh rhm rhn rhr rhs rmb rmc rme rmh rmm rmn rmr rms rnb rnc rnh rnm rnn rnr rns rrb rrc rrh rrm rrn rrr rrs rsb rsc rse rsh rsm rsn rsr rss sbb sbc sbe sbh sbm sbn sbr sbs scb scc sce sch scm scn scr scs se- seb sec see seh sem sen ser ses sh- shb shc she shh shm shn shr shs smb smc sme smh smm smn smr sms snb snc sne snm snn snr sns sr- srb src sre srh srm srn srr srs ss- ssb ssc sse ssh ssm ssn ssr sss