-er -th bbb bbc bbe bbg bbh bbr bbs bbt bcb bcc bce bcg bch bcr bcs bct be- beb bec bee beg beh ber bes bet bgb bgc bge bgg bgh bgr bgs bgt bhb bhc bhe bhg bhh bhr bhs bht brb bre brg brh brr brs brt bsb bsc bse bsg bsh bsr bss bst btb btc bte btg bth btr bts btt c-- cbb cbc cbe cbg cbh cbr cbs cbt ccb ccc cce ccg cch ccr ccs cct ce- ceb cec cee ceg ceh cer ces cet cgb cgc cge cgg cgh cgr cgs cgt ch- chb chc che chg chh chr chs cht crb crc cre crg crh crr crs crt csb csc cse csg csh csr css cst ctb ctc cte ctg cth ctr cts ctt ebb ebc ebe ebg ebh ebr ebs ebt ec- ecb ecc ece ecg ech ecr ecs ect eeb eec eee eeg eer ees eet egb egc ege egg egh egr egs egt ehb ehc ehe ehg ehh ehr ehs eht erb erc ere erg erh err ers ert es- esb esc ese esg esh esr ess est etb etc ete etg eth etr ets ett gbc gbe gbg gbh gbr gbs gbt gcb gcc gce gcg gch gcr gcs gct ge- geb gec gee geg geh ger ges get ggb ggc ggg ggh ggr ggs ggt ghb ghc ghe ghg ghh ghr ghs ght grb grc gre grg grh grr grs grt gsb gsc gse gsg gsr gss gst gtb gtc gte gtg gth gtr gts gtt hbb hbc hbe hbg hbh hbr hbs hbt hcb hcc hce hcg hch hcr hcs hct he- heb hec hee heg heh her hes het hgb hgc hge hgg hgh hgr hgs hgt hhb hhc hhe hhg hhh hhr hhs hht hr- hrb hrc hre hrg hrh hrr hrs hrt hsb hsc hse hsg hsh hsr hss hst htb htc hte htg hth htr hts htt rbb rbc rbe rbg rbh rbr rbs rbt rcb rcc rce rcg rch rcr rcs rct re- reb rec ree reg reh rer res ret rgb rgc rge rgg rgh rgr rgs rgt rh- rhb rhc rhe rhg rhh rhr rhs rht rrb rrc rrg rrh rrr rrs rrt rsb rsc rse rsg rsh rsr rss rst rtb rtc rte rtg rtr rts rtt sbb sbc sbe sbg sbh sbr sbs sbt scb scc sce scg sch scr scs sct se- seb sec see seg seh ser ses set sgb sgc sge sgg sgh sgr sgs sgt sh- shb shc she shg shh shr shs sht sr- srb src sre srg srh srr srs srt ss- ssb ssc sse ssg ssh ssr sss sst stb stc ste stg sth str sts stt tbb tbc tbe tbg tbh tbr tbs tbt tcb tcc tce tcg tch tcr tcs tct te- teb tec tee teg teh ter tes tet tgb tgc tge tgg tgh tgr tgs tgt th- thb thc the thg thh thr ths tht trb trc tre trg trh trr trs trt tsb tsc tse tsg tsh tsr tss tst ttb ttc tte ttg tth ttr tts ttt