-er b-u bbb bbc bbe bbk bbl bbn bbr bbs bbt bbu bcb bcc bce bck bcl bcn bcr bcs bct bcu be- beb bec bee bek bel ben ber bes bet beu bkb bkc bke bkk bkl bkn bkr bks bkt blb blc ble blk bll bln blr bls blt blu bnb bnc bne bnk bnl bnn bnr bns bnt bnu brb bre brk brl brn brr brs brt bru bsb bsc bse bsk bsl bsn bsr bss bst bsu btb btc bte btk btl btn btr bts btt btu bub buc bue buk bul bun bur bus but buu c-- cbb cbc cbe cbk cbl cbn cbr cbs cbt cbu ccb ccc cce cck ccl ccn ccr ccs cct ccu ce- ceb cec cee cek cel cen cer ces cet ceu ckb ckc cks ckt cl- clb clc cle clk cll cln clr cls clt clu cn- cnb cnc cne cnl cnn cnr cns cnt cnu crb crc cre crk crl crn crr crs crt cru csb csc cse csk csl csn csr css cst csu ctb ctc cte ctk ctl ctn ctr cts ctt ctu cub cuc cue cuk cul cun cur cus cut cuu ebb ebc ebe ebk ebl ebn ebr ebs ebt ebu ec- ecb ecc ece eck ecl ecn ecr ecs ect ecu eeb eec eee eek eel een eer ees eet ekb ekc eke ekl ekr eks ekt eku elb elc ele elk ell eln elr els elt elu en- enb enc ene enk enl enn enr ens ent enu erb erc ere erk erl ern err ers ert eru es- esb esc ese esk esl esn esr ess est esu etb etc ete etk etl etn etr ets ett etu eu- eub euc eue eul eun eur eus eut k-t kbb kbc kbe kbk kbl kbn kbr kbs kbu kcb kcc kce kck kcl kcn kcr kcs kct kcu ke- keb kec kee kek kel ken ker kes ket kkb kkc kke kkk kkl kkn kkr kks kkt kku kl- klb klc klr kls klt klu kn- knc kne knk knl knn knr knt knu krc krk krl krn krr krs krt kru ksb ksc kse ksk ksl ksn ksr kss kst ksu ktb ktc kte ktk ktl ktn ktr kts ktt ktu kub kuc kue kuk kul kun kur kus kut kuu lbb lbc lbe lbk lbl lbr lbs lbt lbu lcb lcc lce lck lcl lcn lcr lcs lct lcu leb lec lee lek lel len ler les let leu lkb lkl lkr lks lkt llb llc lle llk lll lln llr lls llt llu lnb lnc lne lnk lnl lnn lnr lns lnt lnu lrb lrc lrk lrn lrr lrs lrt lru lsb lsc lse lsk lsl lsn lsr lss lst lsu ltb ltc lte ltk ltl ltr lts ltt ltu lub luc lue luk lul lun lur lus lut luu nbb nbc nbe nbk nbl nbn nbr nbs nbt nbu ncb ncc nce nck ncl ncn ncr ncs nct ncu ne- neb nec nee nek nel nen ner nes net neu nkc nke nkk nkn nkr nks nkt nku nlb nlc nle nlk nll nln nlr nls nlt nlu nnb nnc nne nnk nnl nnn nns nnt nnu nrb nrc nre nrk nrl nrn nrr nrs nrt nru nsb nsc nse nsk nsl nsn nsr nss nst nsu ntb ntc nte ntk ntn ntr nts ntt ntu nub nuc nue nuk nul nun nur nus nut nuu rbb rbc rbe rbk rbl rbn rbr rbs rbt rbu rcb rcc rce rcl rcn rcr rcs rct rcu re- reb rec ree rek rel ren rer res ret reu rkb rkc rke rkk rks rkt rku rlc rle rll rln rlr rls rlt rlu rnb rnc rnn rnr rns rnt rnu rrb rrc rrk rrl rrn rrr rrs rrt rru rsb rsc rse rsk rsl rsn rsr rss rst rsu rtb rtc rte rtk rtl rtn rtr rts rtt rtu rub ruc rue ruk run rur rus rut ruu sbb sbc sbe sbk sbl sbn sbr sbs sbt sbu scb scc sce sck scl scn scr scs sct scu se- seb sec see sek sel sen ser ses set seu sk- skb skc ske skk skl skr sks skt sku slb slc sle slk sll sln slr sls slt slu snb snc sne snk snl snn snr sns snt snu sr- srb src sre srk srl srn srr srs srt ss- ssb ssc sse ssk ssl ssn ssr sss sst ssu stb stc ste stk stl stn str sts stt stu sub suc sue suk sul sun sur sus sut suu tbb tbc tbe tbk tbl tbn tbr tbs tbt tbu tcb tcc tce tck tcl tcn tcr tcs tct tcu te- teb tec tee tek tel ten ter tes tet teu tkb tkc tke tkk tkl tkr tks tkt tlc tle tlk tll tln tlr tls tlt tlu tnb tnc tne tnk tnl tnn tnr tns tnt trb trc tre trk trl trn trr trs trt tru tsb tsc tse tsk tsl tsn tsr tss tst tsu ttb ttc tte ttk ttl ttn ttr tts ttt ttu tub tuc tue tuk tul tun tur tus tut tuu ubb ubc ube ubk ubl ubn ubr ubs ubt ubu ucb ucc uce uck ucl ucn ucr ucs uct ucu ueb uec uee uel uen uer ues uet ukb ukc uke ukk ukl ukn ukr uku ulb ulc ule ulk ull uln ulr uls ult ulu un- unb unc une unk unl unn unr uns unt unu ur- urb urc ure urk url urn urr urs urt uru usb usc use usk usl usn usr uss ust usu utb utc ute utk utl utn utr uts utt utu uuc uue uun uur uus uut uuu