-er bbb bbc bbe bbg bbh bbl bbr bbs bcb bcc bce bcg bch bcl bcr bcs be- beb bec bee beg beh bel ber bes bgb bgc bge bgg bgh bgl bgr bgs bhb bhc bhe bhg bhh bhl bhr bhs blb blc ble blg blh bll blr bls brb bre brg brh brl brr brs bsb bsc bse bsg bsh bsl bsr bss c-- cbb cbc cbe cbg cbh cbl cbr cbs ccb ccc cce ccg cch ccl ccr ccs ce- ceb cec cee ceg ceh cel cer ces cgb cgc cge cgg cgh cgl cgr cgs ch- chb chc che chg chh chl chr chs cl- clb clc cle clg clh cll clr cls crb crc cre crg crh crl crr crs csb csc cse csg csh csl csr css ebb ebc ebe ebg ebh ebl ebr ebs ec- ecb ecc ece ecg ech ecl ecr ecs eeb eec eee eeg eel eer ees egb egc ege egg egh egl egr egs ehb ehc ehe ehg ehh ehl ehr ehs elb elc ele elg elh ell elr els erb erc ere erg erh erl err ers es- esb esc ese esg esh esl esr ess gbc gbe gbg gbh gbl gbr gbs gcb gcc gce gcg gch gcl gcr gcs ge- geb gec gee geg geh gel ger ges ggb ggc ggg ggh ggr ggs ghb ghc ghe ghg ghh ghl ghr ghs glb glc gle glg glh gll glr gls grb grc gre grg grh grl grr grs gsb gsc gse gsg gsl gsr gss hbb hbc hbe hbg hbh hbl hbr hbs hcb hcc hce hcg hch hcl hcr hcs he- heb hec hee heg heh hel her hes hgb hgc hge hgg hgh hgl hgr hgs hhb hhc hhe hhg hhh hhl hhr hhs hlb hlc hle hlg hlh hll hlr hls hr- hrb hrc hre hrg hrh hrl hrr hrs hsb hsc hse hsg hsh hsl hsr hss lbb lbc lbe lbg lbh lbl lbr lbs lcb lcc lce lcg lch lcl lcr lcs leb lec lee leg leh lel ler les lgb lgc lge lgg lgh lgl lgr lgs lhb lhc lhh lhr lhs llb llc lle llg lll llr lls lrb lrc lrg lrh lrr lrs lsb lsc lse lsg lsh lsl lsr lss rbb rbc rbe rbg rbh rbl rbr rbs rcb rcc rce rcg rch rcl rcr rcs re- reb rec ree reg reh rel rer res rgb rgc rge rgg rgh rgr rgs rh- rhb rhc rhe rhg rhh rhl rhr rhs rlc rle rlg rlh rll rlr rls rrb rrc rrg rrh rrl rrr rrs rsb rsc rse rsg rsh rsl rsr rss sbb sbc sbe sbg sbh sbl sbr sbs scb scc sce scg sch scl scr scs se- seb sec see seg seh sel ser ses sgb sgc sge sgg sgh sgl sgr sgs sh- shb shc she shg shh shl shr shs slb slc sle slg slh sll slr sls sr- srb src sre srg srh srl srr srs ss- ssb ssc sse ssg ssh ssl ssr sss