bbbb bbbs bbeb bbwr bbws bebb bebe beeb beef beer bees befe beff bere berr bers beru bes- bese bess beur bewe bffs bfsr breb bree bref brer bres brew brfu brrr brrs brsb brsr brue brus brwe bseb bsee bser bses bsff bsfs bsse bubb bube bubs bubu buer bueu bufe buff bufr bur- burb bure burr burs buru buse buss busu buus buwe ebbr ebbs ebbw eber ebes ebru ebur ebus eeee eees eefe eers eese efbr efes effs erbb erbe ereb erer eres erew erfs erre errs erse erub erur erus erws esbs esee eser eses esfs esse essu esuf esus esws euer eur- eure euse euwe ewer ewes ewew ewre fbrs fbus febs feeb feer fees fefe feff ferb fere ferr fers feru fese fess feus fewe ffee ffff ffrr ffss free fres frew frsb frub frue fssf fubb fubs fubu fuff fufu fur- fure furr furs fuse fuss fusu fwse rbbb rbbr rbbs rbss rebb rebe rebs rebu reeb reef rees refe reff refr refs refu rere rers reru rese ress reue reuf reus reuu rewe rews rfef rrrr rsee rsre rubb rube rubs rubu ruer rues rufe ruff rure rurs ruru ruse russ rusu ruwe sbbs sbef sber sbse sbus sbwr se-e se-f se-s se-u se-w sebe sebs seeb seef seer sees seeu seew seff serb sere serf serr sers seru sese sess seur sewe sewr sews sewu sfer sfss sfsu sfwu sreb sres srub ssbr ssee sses ssrs sssb sssf ssss ssws sub- subb subs suee suer sues sueu suf- suff sufr sufs sufu sur- sure surf surr surs suru sus- suse suss susu suus suwe suwu swbs swbw sweb swee swer swfu swre swss ubbe uber uers uess uewe ufer uffe urbe urbs ure- ures urfe urff urre urse urss ursu urur urus usbe usbr usbs usee usef user uses usfs ussb usse ussf ussr usss ussu usus uuuu uwer wbbb wbbe wbbf wbbr wbbs wbbw wbeb wber wbes wbew wbfb wbfe wbff wbfr wbfs wbfw wbrb wbrf wbrr wbrs wbru wbrw wbsb wbsf wbsr wbss wbsu wbsw wbuf wbus wbuw wbwb webb webe webf webs weeb weef weer wees weeu wefe weff wefr wefs wer- werb were werf werr wers werw wesb wese wesr wess wesu wewe wfbe wfbf wfbr wfbs wfeb wfer wfff wfrb wfre wfrf wfrs wfru wfrw wfsb wfse wfsr wfss wfsu wfur wfus wrbb wrbe wrbf wrbs wrbu wrbw wreb wree wrer wrew wrfb wrfe wrff wrfs wrfu wrfw wrrb wrre wrrs wrrw wrsb wrse wrsf wrsr wrss wrsw wrub wruf wrus wrwb wrwr wsbb wsbr wsbs wsbu wsbw wseb wses wsew wsfb wsff wsfr wsfs wsfw wsrb wsre wsrf wsrs wsru wsrw wssr wsss wssu wssw wsue wsuf wsur wsus wsuw wswb wswr wsws wsww wubb wubr wubu wufe wuff wufr wur- wurb wusb wusf wusr wuss wusu wusw wuub wuuf wuuu wuwe wuwf wwbb wwbf wwbr wwbu wweb wwer wwfe wwfr wwfw wwrb wwre wwrf wwrr wwru wwrw wwsb wwse wwsf wwsr wwss wwsu wwuf wwus wwwe wwwr wwws wwww