-er bbb bbc bbe bbg bbk bbl bbr bbs bbt bcb bcc bce bcg bck bcl bcr bcs bct be- beb bec bee beg bek bel ber bes bet bgb bgc bge bgg bgk bgl bgr bgs bgt bkb bkc bke bkg bkk bkl bkr bks bkt blb blc ble blg blk bll blr bls blt brb bre brg brk brl brr brs brt bsb bsc bse bsg bsk bsl bsr bss bst btb btc bte btg btk btl btr bts btt c-- cbb cbc cbe cbg cbk cbl cbr cbs cbt ccb ccc cce ccg cck ccl ccr ccs cct ce- ceb cec cee ceg cek cel cer ces cet cgb cgc cge cgg cgl cgr cgs cgt ckb ckc cks ckt cl- clb clc cle clg clk cll clr cls clt crb crc cre crg crk crl crr crs crt csb csc cse csg csk csl csr css cst ctb ctc cte ctg ctk ctl ctr cts ctt ebb ebc ebe ebg ebk ebl ebr ebs ebt ec- ecb ecc ece ecg eck ecl ecr ecs ect eeb eec eee eeg eek eel eer ees eet egb egc ege egg egl egr egs egt ekb ekc eke ekg ekl ekr eks ekt elb elc ele elg elk ell elr els elt erb erc ere erg erk erl err ers ert es- esb esc ese esg esk esl esr ess est etb etc ete etg etk etl etr ets ett gbc gbe gbg gbk gbl gbr gbs gbt gcb gcc gce gcg gck gcl gcr gcs gct ge- geb gec gee geg gek gel ger ges get ggb ggc ggg ggr ggs ggt gkb gks gkt glb glc gle glg glk gll glr gls glt grb grc gre grg grk grl grr grs grt gsb gsc gse gsg gsk gsl gsr gss gst gtb gtc gte gtg gtk gtl gtr gts gtt k-t kbb kbc kbe kbk kbl kbr kbs kcb kcc kce kcg kck kcl kcr kcs kct ke- keb kec kee keg kek kel ker kes ket kgb kgc kgl kgs kkb kkc kke kkk kkl kkr kks kkt kl- klb klc klg klr kls klt krc krg krk krl krr krs krt ksb ksc kse ksg ksk ksl ksr kss kst ktb ktc kte ktg ktk ktl ktr kts ktt lbb lbc lbe lbg lbk lbl lbr lbs lbt lcb lcc lce lcg lck lcl lcr lcs lct leb lec lee leg lek lel ler les let lgb lgc lge lgg lgk lgl lgr lgs lgt lkb lkg lkl lkr lks lkt llb llc lle llg llk lll llr lls llt lrb lrc lrg lrk lrr lrs lrt lsb lsc lse lsg lsk lsl lsr lss lst ltb ltc lte ltg ltk ltl ltr lts ltt rbb rbc rbe rbg rbk rbl rbr rbs rbt rcb rcc rce rcg rcl rcr rcs rct re- reb rec ree reg rek rel rer res ret rgb rgc rge rgg rgk rgr rgs rgt rkb rkc rke rkg rkk rks rkt rlc rle rlg rll rlr rls rlt rrb rrc rrg rrk rrl rrr rrs rrt rsb rsc rse rsg rsk rsl rsr rss rst rtb rtc rte rtg rtk rtl rtr rts rtt sbb sbc sbe sbg sbk sbl sbr sbs sbt scb scc sce scg sck scl scr scs sct se- seb sec see seg sek sel ser ses set sgb sgc sge sgg sgk sgl sgr sgs sgt sk- skb skc ske skg skk skl skr sks skt slb slc sle slg slk sll slr sls slt sr- srb src sre srg srk srl srr srs srt ss- ssb ssc sse ssg ssk ssl ssr sss sst stb stc ste stg stk stl str sts stt tbb tbc tbe tbg tbk tbl tbr tbs tbt tcb tcc tce tcg tck tcl tcr tcs tct te- teb tec tee teg tek tel ter tes tet tgb tgc tge tgg tgk tgl tgr tgs tgt tkb tkc tke tkg tkk tkl tkr tks tkt tlc tle tlg tlk tll tlr tls tlt trb trc tre trg trk trl trr trs trt tsb tsc tse tsg tsk tsl tsr tss tst ttb ttc tte ttg ttk ttl ttr tts ttt

bbbb bbbs bbeb bbet bblb bbls bbrc bbrg bcbc bcbg bcbs bccc bccl bccs bcec bcer bces bcet bcgs bcrs bcsc bcsl bcss bctc bcts bebb bebe beck becs beeb beeg beek beel beer bees beet begg begs beke beks bele belg belk bell bels belt berc bere berg berk berr bers bert bes- bese besk bess best betc bete bets bett bggs bgst blbt bleb blee bleg blek bles blet blkb blls blrc blrg blss blst blts brcb brce breb brec bree breg brek brel brer bres bret brkb brls brrr brrs brsb brsr brst brtc bscs bseb bsec bsee bseg bser bses bset bsgs bskt bslc bssc bsse bsts btcc btcl btcs btec btek btrc btrt btss bttb cbbc cbbs cbcc cbce cbcl cbcr cbcs cbct cbec cbee cber cbet cbgb cbkg cbkl cbkr cblb cblc cbre cbrl cbrt cbsc cbse cbtc cbtl ccbc cccb cccc cccl cccs ccee ccel ccgc ccgs ccgt cclc cclg ccls ccrc ccre ccrg ccrl ccrs ccrt ccsg ccsl ccss ccst cctb cctc cctl cctt cebs cec- cece cecs cect ceeb ceec ceel cees cege ceke cel- celc cele cell cels celt cer- cerc cere cerl cers cert cesc cese cesg cesr cess cest cet- cete cets cgcc cgcg cgel cger cges cggs cgsb cgss cgst cgtl ckbc ckbe ckck ckcl ckcs cker ckgl cklg ckrc cksb cksl ckst cktb ckts clec clee cleg clek cler cles clet clkg clrs clsc cltb cltc clts crbc crcc crce crcr cre- creb crec cree creg cres cret crgs crkc crkl crls crrt crss crst crtc crtl crts cscb cscc csce cscl cscr cscs csec csee cser cset csks cslr csrc csrs csse cssr cstc cstg cstr csts ctbs ctec ctge ctle ctlg ctls ctrc ctrl ctrs ctsc ctss ctts e-cl ebbc ebbr ebbs ebcc