-er b-u bbb bbc bbe bbk bbr bbs bbu bcb bcc bce bck bcr bcs bcu bcz be- beb bec bee bek ber bes beu bez bkb bkc bke bkk bkr bks brb bre brk brr brs bru brz bsb bsc bse bsk bsr bss bsu bub buc bue buk bur bus buu buz bze bzr bzs bzu bzz c-- cbb cbc cbe cbk cbr cbs cbu cbz ccb ccc cce cck ccr ccs ccu ccz ce- ceb cec cee cek cer ces ceu cez ckb ckc cks crb crc cre crk crr crs cru crz csb csc cse csk csr css csu csz cub cuc cue cuk cur cus cuu cuz cz- czc cze czk ebb ebc ebe ebk ebr ebs ebu ec- ecb ecc ece eck ecr ecs ecu eeb eec eee eek eer ees ekb ekc eke ekr eks eku erb erc ere erk err ers eru erz es- esb esc ese esk esr ess esu eu- eub euc eue eur eus eze ezr ezs ezz k-z kbb kbc kbe kbk kbr kbs kbu kbz kcb kcc kce kck kcr kcs kcu ke- keb kec kee kek ker kes kez kkb kkc kke kkk kkr kks kku krc krk krr krs kru ksb ksc kse ksk ksr kss ksu kub kuc kue kuk kur kus kuu rbb rbc rbe rbk rbr rbs rbu rcb rcc rce rcr rcs rcu re- reb rec ree rek rer res reu rez rkb rkc rke rkk rks rku rkz rrb rrc rrk rrr rrs rru rsb rsc rse rsk rsr rss rsu rub ruc rue ruk rur rus ruu ruz rzb rze sbb sbc sbe sbk sbr sbs sbu scb scc sce sck scr scs scu se- seb sec see sek ser ses seu sez sk- skb skc ske skk skr sks sku sr- srb src sre srk srr srs ss- ssb ssc sse ssk ssr sss ssu ssz sub suc sue suk sur sus suu suz sze szr szu ubb ubc ube ubk ubr ubs ubu ucb ucc uce uck ucr ucs ucu ueb uec uee uer ues ukb ukc uke ukk ukr uku ukz ur- urb urc ure urk urr urs uru urz usb usc use usk usr uss usu usz uuc uue uur uus uuu uzb uzu zbb zbc zbr zbs zce zcs zeb zec zee zek zer zes zez zks zrs zse zsu zsz zub zuc zuk zur zus zuz zzr zzs zzz

bbbb bbbs bbeb bbrc bcbc bcbs bccc bccs bcec bcer bces bcrs bcru bcsc bcss bcuc bebb bebe beck becs becu beeb beek beer bees beke beks berc bere berk berr bers beru bes- bese besk bess beuk beur beze bezu brcb brce breb brec bree brek brer bres brez brkb brrr brrs brsb brsr bruc brue brus bruz bscs bseb bsec bsee bser bses bssc bsse bubb bube bubs bubu bucc buce buck bucs bucu bucz buer bueu buke bukk buku bur- burb bure burk burr burs buru burz busc buse busk buss busu buus buuz buze buzz bzer bzrk bzzz cbbc cbbs cbcc cbce cbcr cbcs cbcu cbec cbee cber cbkr cbre cbsc cbse cbus ccbc cccb cccc cccs cccu ccee ccrc ccre ccrs ccss ccuc ccus cebs cebu cec- cece cecs ceeb ceec cees ceke cer- cerc cere cers cesc cese cesr cess ceze ckbc ckbe ckck ckcs cker ckrc cksb crbc crbu crcc crce crcr crcz cre- creb crec cree cres creu crkc crss crub crue cruk crus cruz cscb cscc csce cscr cscs csec csee cser csks csrc csrs csse cssr csur csus cub- cubb cube cubs cucc cuce cuck cuek cuer cues cuk- cuke curb cure curr curs cusb cusk cuss cusu ebbc ebbr ebbs ebcc eber ebes ebru ebur ebus ecbc ecbe eccb eccc ecce eces ecks ecrc ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eeke eeks eerc eers eese eesk eeze ekeb ekek eker ekes ekur erbb erbe ercc erce ereb erec erer eres erez erke erks errc erre errs erse erub eruc erur erus esbs escb esce escr escs escu esee esek eser eses eske esks esku esse essu esus eubc euer eur- eurc eure euse ezek ezer ezuz kbbb kbbc kbbe kbbk kbbr kbbs kbbu kbbz kbcb kbce kbck kbcr kbcs kbcu kbcz kbeb kbec kbee kbek kber kbes kbez kbkb kbkk kbkr kbkz kbrb kbrc kbre kbrk kbru kbrz kbsb kbsk kbsr kbss kbsu kbsz kbub kbuc kbue kbuk kbur kbus kbuu kbuz kbzc kbze kbzs kbzu kbzz kcbc kcbk kcbr kcbs kcbu kccb kccc kcck kccr kccu kceb kcec kcee kceu kcez kckc kckk kckr kckz kcrc kcrr kcrs kcru kcrz kcsb kcsc kcse kcsr kcss kcsu kcub kcue kcuk kcuz kcze kczz kebb kebc kebe kebr kebu keck kecr keek keer kees kekb kekc keke keks keku ker- kerb kerc kere kerk kerr kers keru kerz kesb kesc kesk kesr kess kesz keur keus kezb keze kezr kezz kkbb kkbe kkbr kkbs kkbz kkcb kkck kkcr kkcs kkez kkkk kkrb kkrc kkre kkrk kkrr kkrs kkrz kkse kksr kkss kksu kkus kkuu kkzu kkzz krbb krbe krbk krbr krbz krcb krcc krce krcs krcu kreb krec kree krek kres kreu krez krkc krke krkk krkr krks krku krkz krrb krrc krre krrk krrr krrs krrz krsc krse krsk krsr krss krsu kruc krue kruk krur kruz krze krzk krzr krzs krzz ksbc ksbr ksbs ksbz kscb ksce ksck kscr kscs kscu ksec ksee ksek kser ksez kskb kske kskk kskr ksks ksku kskz ksrb ksrr ksrs ksrz ksse kssr ksss kssu kssz ksub ksue ksuu kszr kubb kubc kube kubr kubs kubu kucb kucc kuce kucr kuek kues kueu kuke kukk kuks kuku kurb kure kurk kurr kurs kuru kurz kusb kusc kusu kuub kuuk kuur kuuu kuuz kuze kuzu kuzz kzbb kzbe kzbk kzbr kzbs kzbz kzcr kzee kzer kzke kzkr kzks kzkz kzrb kzrc kzrk kzrr kzrs kzrz kzsb kzsc kzse kzsu kzue kzus kzuu kzuz kzzb kzzk kzzr kzzs kzzz rbbb rbbr rbbs rbss rcbc