-er bbb bbc bbe bbh bbl bbn bbr bbs bcb bcc bce bch bcl bcn bcr bcs be- beb bec bee beh bel ben ber bes bhb bhc bhe bhh bhl bhr bhs blb blc ble blh bll bln blr bls bnb bnc bne bnl bnn bnr bns brb bre brh brl brn brr brs bsb bsc bse bsh bsl bsn bsr bss c-- cbb cbc cbe cbh cbl cbn cbr cbs ccb ccc cce cch ccl ccn ccr ccs ce- ceb cec cee ceh cel cen cer ces ch- chb chc che chh chl chn chr chs cl- clb clc cle clh cll cln clr cls cn- cnb cnc cne cnh cnl cnn cnr cns crb crc cre crh crl crn crr crs csb csc cse csh csl csn csr css ebb ebc ebe ebh ebl ebn ebr ebs ec- ecb ecc ece ech ecl ecn ecr ecs eeb eec eee eel een eer ees ehb ehc ehe ehh ehl ehn ehr ehs elb elc ele elh ell eln elr els en- enb enc ene enh enl enn enr ens erb erc ere erh erl ern err ers es- esb esc ese esh esl esn esr ess hbb hbc hbe hbh hbl hbn hbr hbs hcb hcc hce hch hcl hcn hcr hcs he- heb hec hee heh hel hen her hes hhb hhc hhe hhh hhl hhn hhr hhs hlb hlc hle hlh hll hln hlr hls hnb hnc hne hnh hnl hnn hns hr- hrb hrc hre hrh hrl hrn hrr hrs hsb hsc hse hsh hsl hsn hsr hss lbb lbc lbe lbh lbl lbr lbs lcb lcc lce lch lcl lcn lcr lcs leb lec lee leh lel len ler les lhb lhc lhh lhr lhs llb llc lle lll lln llr lls lnb lnc lne lnh lnl lnn lnr lns lrb lrc lrh lrn lrr lrs lsb lsc lse lsh lsl lsn lsr lss nbb nbc nbe nbl nbn nbr nbs ncb ncc nce nch ncl ncn ncr ncs ne- neb nec nee neh nel nen ner nes nhb nhc nhe nhh nhl nhn nhr nhs nlb nlc nle nlh nll nln nlr nls nnb nnc nne nnh nnl nnn nns nrb nrc nre nrl nrn nrr nrs nsb nsc nse nsh nsl nsn nsr nss rbb rbc rbe rbh rbl rbn rbr rbs rcb rcc rce rch rcl rcn rcr rcs re- reb rec ree reh rel ren rer res rh- rhb rhc rhe rhh rhl rhn rhr rhs rlc rle rlh rll rln rlr rls rnb rnc rnh rnn rnr rns rrb rrc rrh rrl rrn rrr rrs rsb rsc rse rsh rsl rsn rsr rss sbb sbc sbe sbh sbl sbn sbr sbs scb scc sce sch scl scn scr scs se- seb sec see seh sel sen ser ses sh- shb shc she shh shl shn shr shs slb slc sle slh sll sln slr sls snb snc sne snl snn snr sns sr- srb src sre srh srl srn srr srs ss- ssb ssc sse ssh ssl ssn ssr sss