bbbb bbci bbeb bbpr bbrc bcbc bcbp bccc bcci bcec bcer bcie bcpp bcru bcuc bcup bebb bebe bebi beci becu beeb beep beer beic beir berc bere beri berr beru beur bibb bibe bibi bicc bice bici bieb bier bieu bipp bipu birb bire biri birr biru bpcp bprc brcb brce breb brec bree brei brep brer bric brie brrr bruc brue brup bubb bube bubi bubu bucc buce buci bucu buer bueu buic buie buir buiu bupc bur- burb bure buri burp burr buru cbbc cbcc cbce cbcp cbcr cbcu cbec cbee cber cbir cbpc cbpp cbre ccbc cccb cccc ccci cccp cccu ccee ccic ccii ccip ccir ccpe ccpp ccpr ccrc ccre ccri ccrp ccuc ccup cebp cebu cec- cece ceci cecp ceeb ceec ceip cepc cepe cepp cepr cer- cerc cere ceri cerp ceui cibc cibe cibi cicc cici cicr cicu ciee cier ciii cipp cirb circ cire ciri cirr ciuc ciup cpbc cpce cpcu cpeb cpep cper cpic cpre cpri crbc crbu crcc crce crcr cre- creb crec cree crei crep creu crib cric crie crip criu crpc crub crue crup cub- cubb cube cubi cucc cuce cuci cuer cui- cuir cupe cupp cupr curb cure curi curr ebbc ebbr ebcc eber ebic ebru ebur ecbc ecbe eccb eccc ecce ecci ecib ecip ecpp ecrc ecri ecrr ecru eeee eerc eiec eiei eier eipr eire epcc epci epec epee eper epi- epic epie epip eppc eppp eprb eprp epub erbb erbe ercc erce ercp ereb erec erei erer eric erie eriu erpe errc erre erub eruc erur eubc eubi euer eur- eurc eure i-be ibec ibie ibrc ibri icbc icbp iccb iccc icci iccp iccr iccu icec icee icer icpc icrc icre icrr icru icub icue icup iecc ieie iere ieri iiie iiii iirc iiuc ipcc ipce ipec iper ipie ippc ippr ipri ipur irbe irbp ircc ircu iree irer iri- iric irie irip irpc irpe irrc irre irri iucc iuce iuiu iupp pbcc pcbc pccc pcce pcep pcer pcip pcpb pcpp pcrc pcre pece peci pecr peec peep peer peip peir pepe pepi per- perc pere peri perp perr peru peur pibb pibi picc pice pici picr picu piep pier piip pipe pipi pipp pirc pire piri pirr piru ppcc ppci pper ppib ppic ppie pppp pprc ppru ppur prbc prcc prcp pre- preb prec pree prep preu pri- prie prii prri prue pruu pu-e pube pubu puce puer pueu puir puiu pupe pupi pupu pur- purb pure puri purp purr puru puuc rbbb rbbr rcbc rccb rccc rcep rcic rcpi rebb rebe rebu recc rece reci recp recr recu reeb reep reii reir reiu repe repi repp repr repu rere reri reru reue reup reuu rib- ribe ribu ricc rice riep rier rieu ripe ripi ripp ripr rire riri riue rpii rrrr rubb rube rubi rubp rubu ruce ruci ruer rupe rupp rurc rure ruri rurp ruru u-ie u-rp ubbe ubbi uber ubic ubii ubir ubpc ucbc ucci uccp ucpb ucrc ueir uepi uipi uirr upbe upci upic upie uppc uppe uppp uppu upri upup urbe urbi urci ure- urib uric urie uriu urre urri urup urur uucp uuri uuuu