-er bbb bbc bbe bbg bbh bbl bbn bbr bcb bcc bce bcg bch bcl bcn bcr be- beb bec bee beg beh bel ben ber bgb bgc bge bgg bgh bgl bgn bgr bhb bhc bhe bhg bhh bhl bhr blb blc ble blg blh bll bln blr bnb bnc bne bng bnl bnn bnr brb bre brg brh brl brn brr c-- cbb cbc cbe cbg cbh cbl cbn cbr ccb ccc cce ccg cch ccl ccn ccr ce- ceb cec cee ceg ceh cel cen cer cgb cgc cge cgg cgh cgl cgn cgr ch- chb chc che chg chh chl chn chr cl- clb clc cle clg clh cll cln clr cn- cnb cnc cne cng cnh cnl cnn cnr crb crc cre crg crh crl crn crr ebb ebc ebe ebg ebh ebl ebn ebr ec- ecb ecc ece ecg ech ecl ecn ecr eeb eec eee eeg eel een eer egb egc ege egg egh egl egn egr ehb ehc ehe ehg ehh ehl ehn ehr elb elc ele elg elh ell eln elr en- enb enc ene eng enh enl enn enr erb erc ere erg erh erl ern err gbc gbe gbg gbh gbl gbn gbr gcb gcc gce gcg gch gcl gcn gcr ge- geb gec gee geg geh gel gen ger ggb ggc ggg ggh ggn ggr ghb ghc ghe ghg ghh ghl ghn ghr glb glc gle glg glh gll gln glr gnb gnc gne gnl gnn gnr grb grc gre grg grh grl grn grr hbb hbc hbe hbg hbh hbl hbn hbr hcb hcc hce hcg hch hcl hcn hcr he- heb hec hee heg heh hel hen her hgb hgc hge hgg hgh hgl hgn hgr hhb hhc hhe hhg hhh hhl hhn hhr hlb hlc hle hlg hlh hll hln hlr hnb hnc hne hng hnh hnl hnn hr- hrb hrc hre hrg hrh hrl hrn hrr lbb lbc lbe lbg lbh lbl lbr lcb lcc lce lcg lch lcl lcn lcr leb lec lee leg leh lel len ler lgb lgc lge lgg lgh lgl lgn lgr lhb lhc lhh lhr llb llc lle llg lll lln llr lnb lnc lne lng lnh lnl lnn lnr lrb lrc lrg lrh lrn lrr nbb nbc nbe nbg nbl nbn nbr ncb ncc nce ncg nch ncl ncn ncr ne- neb nec nee neg neh nel nen ner ngb ngc nge ngg ngh ngl ngn nhb nhc nhe nhg nhh nhl nhn nhr nlb nlc nle nlg nlh nll nln nlr nnb nnc nne nng nnh nnl nnn nrb nrc nre nrg nrl nrn nrr rbb rbc rbe rbg rbh rbl rbn rbr rcb rcc rce rcg rch rcl rcn rcr re- reb rec ree reg reh rel ren rer rgb rgc rge rgg rgh rgn rgr rh- rhb rhc rhe rhg rhh rhl rhn rhr rlc rle rlg rlh rll rln rlr rnb rnc rng rnh rnn rnr rrb rrc rrg rrh rrl rrn rrr