-er bbb bbc bbe bbg bbh bbk bbn bbr bbs bcb bcc bce bcg bch bck bcn bcr bcs be- beb bec bee beg beh bek ben ber bes bgb bgc bge bgg bgh bgk bgn bgr bgs bhb bhc bhe bhg bhh bhk bhr bhs bkb bkc bke bkg bkk bkn bkr bks bnb bnc bne bng bnk bnn bnr bns brb bre brg brh brk brn brr brs bsb bsc bse bsg bsh bsk bsn bsr bss c-- cbb cbc cbe cbg cbh cbk cbn cbr cbs ccb ccc cce ccg cch cck ccn ccr ccs ce- ceb cec cee ceg ceh cek cen cer ces cgb cgc cge cgg cgh cgn cgr cgs ch- chb chc che chg chh chk chn chr chs ckb ckc ckh cks cn- cnb cnc cne cng cnh cnn cnr cns crb crc cre crg crh crk crn crr crs csb csc cse csg csh csk csn csr css ebb ebc ebe ebg ebh ebk ebn ebr ebs ec- ecb ecc ece ecg ech eck ecn ecr ecs eeb eec eee eeg eek een eer ees egb egc ege egg egh egn egr egs ehb ehc ehe ehg ehh ehn ehr ehs ekb ekc eke ekg ekh ekr eks en- enb enc ene eng enh enk enn enr ens erb erc ere erg erh erk ern err ers es- esb esc ese esg esh esk esn esr ess gbc gbe gbg gbh gbk gbn gbr gbs gcb gcc gce gcg gch gck gcn gcr gcs ge- geb gec gee geg geh gek gen ger ges ggb ggc ggg ggh ggn ggr ggs ghb ghc ghe ghg ghh ghn ghr ghs gkb gkh gkn gks gnb gnc gne gnn gnr gns grb grc gre grg grh grk grn grr grs gsb gsc gse gsg gsk gsn gsr gss hbb hbc hbe hbg hbh hbk hbn hbr hbs hcb hcc hce hcg hch hck hcn hcr hcs he- heb hec hee heg heh hek hen her hes hgb hgc hge hgg hgh hgk hgn hgr hgs hhb hhc hhe hhg hhh hhk hhn hhr hhs hkb hkg hkh hkk hkn hkr hks hnb hnc hne hng hnh hnk hnn hns hr- hrb hrc hre hrg hrh hrk hrn hrr hrs hsb hsc hse hsg hsh hsk hsn hsr hss kbb kbc kbe kbh kbk kbn kbr kbs kcb kcc kce kcg kch kck kcn kcr kcs ke- keb kec kee keg keh kek ken ker kes kgb kgc kgh kgs khe khh khk khn khr khs kkb kkc kke kkh kkk kkn kkr kks kn- knc kne kng knk knn knr krc krg krk krn krr krs ksb ksc kse ksg ksh ksk ksn ksr kss nbb nbc nbe nbg nbk nbn nbr nbs ncb ncc nce ncg nch nck ncn ncr ncs ne- neb nec nee neg neh nek nen ner nes ngb ngc nge ngg ngh ngk ngn ngs nhb nhc nhe nhg nhh nhk nhn nhr nhs nkc nke nkk nkn nkr nks nnb nnc nne nng nnh nnk nnn nns nrb nrc nre nrg nrk nrn nrr nrs nsb nsc nse nsg nsh nsk nsn nsr nss rbb rbc rbe rbg rbh rbk rbn rbr rbs rcb rcc rce rcg rch rcn rcr rcs re- reb rec ree reg reh rek ren rer res rgb rgc rge rgg rgh rgk rgn rgr rgs rh- rhb rhc rhe rhg rhh rhn rhr rhs rkb rkc rke rkg rkk rks rnb rnc rng rnh rnn rnr rns rrb rrc rrg rrh rrk rrn rrr rrs rsb rsc rse rsg rsh rsk rsn rsr rss sbb sbc sbe sbg sbh sbk sbn sbr sbs scb scc sce scg sch sck scn scr scs se- seb sec see seg seh sek sen ser ses sgb sgc sge sgg sgh sgk sgn sgr sgs sh- shb shc she shg shh shk shn shr shs sk- skb skc ske skg skh skk skr sks snb snc sne sng snk snn snr sns sr- srb src sre srg srh srk srn srr srs ss- ssb ssc sse ssg ssh ssk ssn ssr sss