bbbb bbbs bbeb bebb bebe bebi beeb beer bees beir beis bere beri berr bers beru bes- bese bess beur bevs bibb bibe bibi bibs bieb bier bies bieu biis birb bire biri birr birs biru bis- bise biss bisu bive bivi breb bree brei brer bres brev brie bris brrr brrs brsb brsr brue brus bruv brvi bseb bsee bser bses bsse bubb bube bubi bubs bubu buer bueu buie buir buis buiu bur- burb bure buri burr burs buru buse busi buss busu buus buve ebbr ebbs eber ebes ebis ebru ebur ebus eeee eees eers eese eesi eiei eier eies eire eirs eise eiss erbb erbe ereb erei erer eres erev erie eris eriu erre errs erse ersi erub erur erus eruv erve ervi esbs esee eser eses esie esis esri esse essi essu esui esus eubi euer eur- eure euse ever eves evie evir evre evrs i-be ibes ibie ibis ibri ibss ibus ieie iere ieri iers iesi iesr iesu iies iiie iiii iiis iirs iisi iisr iisu irbe iree irer ires iri- irie iris irre irri irrs irse irus irvs isbe iseb isee iser ises isie isis isri isse issi issr isss issu isus iuiu iuse iuss ivbv iver ives ivie ivre ivrs ivue rbbb rbbr rbbs rbis rbss rebb rebe rebs rebu reeb rees reev reii reir reis reiu rere reri rers reru rese resi ress reue reus reuu reve revi revs rib- ribe ribs ribu rier ries rieu riis rire riri rirs rise risi riss risu riue rius rive rivs rrrr rsbi rsee rsis rsre rubb rube rubi rubs rubu ruer rues ruis rure ruri rurs ruru ruse rusi russ rusu ruve ruvi ruvu rver s-ib s-ii s-iv sbbs sber sbse sbsi sbus se-e se-i se-s se-u sebe sebi sebs seeb seer sees seeu seie seii seir seis seiu serb sere seri serr sers seru serv sese sesi sess seui seur seve sevi sibe sibi sibs sibu sier sies sire siri sirr sirs siru sise sisi siss sisu siue siui sius sive sivi sreb sres srib sris srub ssbr ssee sses ssis ssri ssrs sssb sssi ssss sub- subb subi subs suee suer sues sueu suev suie suir suis sur- sure suri surr surs suru surv sus- suse susi suss susu suus suvi suvs svir u-ie ubbe ubbi uber ubii ubir ubis ueir uers uess uies uirr uise urbe urbi urbs ure- ures urib urie uris uriu urre urri urse ursi urss ursu urur urus urve usbe usbr usbs usee user uses usie usis ussb usse ussr usss ussu usui usus uuri uusi uuuu uv-b uver uvis uvri uvvu veer vees veie veii veir veis ver- verb vere veri vers vese vesi vess veur veve vevi vibe vibs vier vies vieu viii virb vire viri virr viru vise visi viss visu viue vive vivi vris vrse vrsi vsee vses vsse vues vuir vurb vuse vver vvsb vvvv