-er b-u bbb bbc bbe bbl bbr bbs bbu bcb bcc bce bcl bcr bcs bcu be- beb bec bee bel ber bes beu blb blc ble bll blr bls blu brb bre brl brr brs bru bsb bsc bse bsl bsr bss bsu bub buc bue bul bur bus buu c-- cbb cbc cbe cbl cbr cbs cbu ccb ccc cce ccl ccr ccs ccu ce- ceb cec cee cel cer ces ceu cl- clb clc cle cll clr cls clu crb crc cre crl crr crs cru csb csc cse csl csr css csu cub cuc cue cul cur cus cuu ebb ebc ebe ebl ebr ebs ebu ec- ecb ecc ece ecl ecr ecs ecu eeb eec eee eel eer ees elb elc ele ell elr els elu erb erc ere erl err ers eru es- esb esc ese esl esr ess esu eu- eub euc eue eul eur eus lbb lbc lbe lbl lbr lbs lbu lcb lcc lce lcl lcr lcs lcu leb lec lee lel ler les leu llb llc lle lll llr lls llu lrb lrc lrr lrs lru lsb lsc lse lsl lsr lss lsu lub luc lue lul lur lus luu rbb rbc rbe rbl rbr rbs rbu rcb rcc rce rcl rcr rcs rcu re- reb rec ree rel rer res reu rlc rle rll rlr rls rlu rrb rrc rrl rrr rrs rru rsb rsc rse rsl rsr rss rsu rub ruc rue rur rus ruu sbb sbc sbe sbl sbr sbs sbu scb scc sce scl scr scs scu se- seb sec see sel ser ses seu slb slc sle sll slr sls slu sr- srb src sre srl srr srs ss- ssb ssc sse ssl ssr sss ssu sub suc sue sul sur sus suu ubb ubc ube ubl ubr ubs ubu ucb ucc uce ucl ucr ucs ucu ueb uec uee uel uer ues ulb ulc ule ull ulr uls ulu ur- urb urc ure url urr urs uru usb usc use usl usr uss usu uuc uue uur uus uuu

bbbb bbbs bbeb bblb bbls bbrc bcbc bcbs bccc bccl bccs bcec bcer bces bcrs bcru bcsc bcsl bcss bcuc bebb bebe becs becu beeb beel beer bees bele bell bels belu berc bere berr bers beru bes- bese bess beur blcu bleb blee bles bleu blls blrc blss blub blue blur blus brcb brce breb brec bree brel brer bres brls brrr brrs brsb brsr bruc brue brus bscs bseb bsec bsee bser bses bslc bssc bsse bubb bube bubs bubu bucc buce bucs bucu buel buer bueu bulb bule bull buls bulu bur- burb bure burl burr burs buru busc buse buss busu buus cbbc cbbs cbcc cbce cbcl cbcr cbcs cbcu cbec cbee cber cblb cblc cbre cbrl cbsc cbse cbus ccbc cccb cccc cccl cccs cccu ccee ccel cclc ccls ccrc ccre ccrl ccrs ccsl ccss ccuc ccus cebs cebu cec- cece cecs ceeb ceec ceel cees cel- celc cele cell cels cer- cerc cere cerl cers cesc cese cesr cess clec clee cler cles cleu clrs clsc club clue crbc crbu crcc crce crcr cre- creb crec cree cres creu crls crss crub crue crus cscb cscc csce cscl cscr cscs csec csee cser cslr cslu csrc csrs csse cssr csur csus cub- cubb cube cubs cucc cuce cuer cues culb culc cule cull culs curb cure curl curr curs cusb cuss cusu e-cl ebbc ebbr ebbs ebcc ebel eber ebes ebru ebul ebur ebus ecbc ecbe eccb eccc ecce eccl eces ecrc ecrl ecrr ecru ecsc ecse ecss ecsu ecus eecs eeee eees eele eels eerc eers eese el-b elbe elbu elcb elce elec elee eler eles elle ells ellu else elsu elue elul elus erbb erbe ercc erce ereb erec erel erer eres erle erll errc erre errs erse erub eruc erur erus esbs escb esce escr escs escu esee esel eser eses esse essl essu esus eubc euer eule eur- eurc eure euse lbcc lblr lbrs lbsc lcbc lccc lcce lccs lcer lces lcls lcrl lcrs lcsc lcsr le-u lebu lece leel leer lees lele lell lelu lerc lere lese less lesu leuc leur llbs llcc llcs lles lleu lllc llll lrcs lrrc lrrr lrse ls-r lsbu lscb lscs lses lsrc lssr lube lubs luce lucs luer lues lule lull lulu lure lurs luse luss rbbb rbbr rbbs rbcl rble rbsl rbss rcbc rccb rccc rccs rcle rcls rcsc rcsl rcss rebb rebe rebs rebu recc rece recr recs recu reeb reel rees relb rele rell rels rere rers reru rese ress reue reul reus reuu rlcs rlee rleu rlls rrle rrrr rscc rscs rsee rslc rsre rssl rubb rube rubs rubu ruce ruel ruer rues rule rull rurc rure rurs ruru ruse russ rusu sbbs sbcc sbcs sber sbse sbus sccc scce sccl sccs scec scee scel scer scl- sclc scls scr- scrc scre scrs scsc scsl scsr scsu scub scul scur se-c se-e se-s se-u sebe sebs sec- secc sece secr secs secu seeb seec seel seer sees seeu selb sele sell sels selu serb serc sere serr sers seru sesc sese sess seul seur slcc slcu sleb slee sler sles slrc slre slrs slsc slsu slub sluc slue slur srbc srcc sreb srec sres srub ssbr sscc ssce sscs ssec ssee sses sslc ssle ssrc ssrl ssrs sssb sssc ssss sub- subb subl subs suc- succ sucr sucs suee suel suer sues sueu sul- sulc sule sull sulu sur- surc sure surr surs suru sus- suse suss susu suus ubbe uber uble ubls ucbc ucel uces ucrc ucsb ucsc ucsu uele uell uers uess ulbc ulcc uleb ulee ules ulle ullr ulul ulus urbe urbs ure- ures urle urls urre urse urss ursu urur urus usbc usbe usbl usbr usbs uscc usce uscs usee usel user uses usle uslu ussb ussc usse ussr usss ussu usul usus uulu uuuu

bbbee bbser bbsrc bbuss bccsl bcell bcers be-er bebel beber bebes becel becue beebe beebs