-er -ic b-u bbb bbc bbe bbf bbi bbk bbl bbr bbs bbu bcb bcc bce bcf bci bck bcl bcr bcs bcu be- beb bec bee bef bei bek bel ber bes beu bfb bfc bfe bff bfi bfl bfr bfs bfu bi- bib bic bie bif bii bik bil bir bis biu bkb bkc bke bkf bkk bkl bkr bks blb blc ble blf bli blk bll blr bls blu brb bre brf bri brk brl brr brs bru bsb bsc bse bsf bsi bsk bsl bsr bss bsu bub buc bue buf bui buk bul bur bus buu c-- cbb cbc cbe cbf cbi cbk cbl cbr cbs cbu ccb ccc cce ccf cci cck ccl ccr ccs ccu ce- ceb cec cee cef cei cek cel cer ces ceu cfb cfc cfe cff cfi cfk cfl cfr cfs cfu ci- cib cic cie cif cii cik cil cir cis ciu ckb ckc cki cks cl- clb clc cle clf cli clk cll clr cls clu crb crc cre crf cri crk crl crr crs cru csb csc cse csf csi csk csl csr css csu cub cuc cue cuf cui cuk cul cur cus cuu ebb ebc ebe ebf ebi ebk ebl ebr ebs ebu ec- ecb ecc ece ecf eci eck ecl ecr ecs ecu eeb eec eee eef eek eel eer ees ef- efb efc efe eff efi efl efr efs eib eic eie eif eii eik eil eir eis eiu ekb ekc eke ekf eki ekl ekr eks eku elb elc ele elf eli elk ell elr els elu erb erc ere erf eri erk erl err ers eru es- esb esc ese esf esi esk esl esr ess esu eu- eub euc eue euf eui eul eur eus fbb fbc fbe fbf fbi fbk fbl fbr fbs fbu fcb fcc fce fcf fci fck fcl fcr fcs fcu feb fec fee fef fei fek fel fer fes feu ffc ffe fff ffi ffk ffl ffr ffs ffu fib fic fie fif fii fik fil fir fis fiu fkb fkc fkf fki fkk fkl flb flc fle flf fli fll flr fls flu frb frc fre frf fri frk frl frr frs fru fsb fsc fse fsf fsi fsk fsl fsr fss fsu fub fue fuf fui fuk ful fur fus fuu i-f ibb ibc ibe ibf ibi ibk ibl ibr ibs ibu icb icc ice icf ici ick icl icr ics icu ie- iec iee ief iei iek iel ier ies ifb ifc ife iff ifi ifl ifr ifs ifu iib iic iie iif iii iil iir iis iiu ikb ikc ike ikf iki ikk ikl ikr iks iku il- ilb ilc ile ilf ili ilk ill ilr ils ilu ir- irb irc ire irf iri irk irl irr irs iru is- isb isc ise isf isi isk isl isr iss isu iu- iub iuc iue iui iur ius kbb kbc kbe kbf kbi kbk kbl kbr kbs kbu kcb kcc kce kci kck kcl kcr kcs kcu ke- keb kec kee kef kei kek kel ker kes kfc kff kfi kfs kfu kib kic kie kif kii kik kil kir kis kiu kkb kkc kke kki kkk kkl kkr kks kku kl- klb klc klf kli klr kls klu krc krf kri krk krl krr krs kru ksb ksc kse ksf ksi ksk ksl ksr kss ksu kub kuc kue kui kuk kul kur kus kuu lbb lbc lbe lbf lbi lbk lbl lbr lbs lbu lcb lcc lce lcf lci lck lcl lcr lcs lcu leb lec lee lef lei lek lel ler les leu lfb lfc lfe lff lfi lfk lfl lfr lfs lfu lib lic lie lif lii lik lil lir lis liu lkb lkl lkr lks llb llc lle llf lli llk lll llr lls llu lrb lrc lrf lri lrk lrr lrs lru lsb lsc lse lsf lsi lsk lsl lsr lss lsu lub luc lue luf lui luk lul lur lus luu rbb rbc rbe rbf rbi rbk rbl rbr rbs rbu rcb rcc rce rcf rci rcl rcr rcs rcu re- reb rec ree ref rei rek rel rer res reu rfb rfc rfe rff rfi rfk rfl rfr rfs rfu rib ric rie rif rii rik ril rir ris rkb rkc rke rkf rkk rks rku rlc rle rlf rli rll rlr rls rlu rrb rrc rrf rri rrk rrl rrr rrs rru rsb rsc rse rsf rsi rsk rsl rsr rss rsu rub ruc rue ruf rui ruk rur rus ruu sbb sbc sbe sbf sbi sbk sbl sbr sbs sbu scb scc sce scf sci sck scl scr scs scu se- seb sec see sef sei sek sel ser ses seu sfb sfc sfe sff sfi sfk sfl sfr sfs sfu sib sic sie sif sii sik sil sir sis siu sk- skb skc ske skf ski skk skl skr sks sku slb slc sle slf sli slk sll slr sls slu sr- srb src sre srf sri srk srl srr srs ss- ssb ssc sse ssf ssi ssk ssl ssr sss ssu sub suc sue suf sui suk sul sur sus suu ubb ubc ube ubf ubi ubk ubl ubr ubs ubu ucb ucc uce ucf uci uck ucl ucr ucs ucu ueb uec uee uef uei uel uer ues ufc ufe uff ufi ufl ufr ufs ufu uib uic uie uif uii uil uir uis uiu ukb ukc uke ukf uki ukk ukl ukr uku ulb ulc ule ulf uli ulk ull ulr uls ulu ur- urb urc ure urf uri urk url urr urs uru usb usc use usf usi usk usl usr uss usu uuc uue uur uus uuu

bbbb bbbs bbci bbeb bbfc bblb bbls bbrc bcbc bcbs bccc bcci bccl bccs bcec bcer bces bcfc bcie bcis bcrs bcru bcsc bcsl bcss bcuc bebb bebe bebi beci beck becs becu beeb beef beek beel beer bees befe beff beic beik beil beir beis beke beki