b-tree bbbbbb becure beebee beebem beembe beemer beerme beeter bemeet bemete bemute berbee berber bereet berere bermet berrer berret bertem bertre berube beteem betere betete betrue bettee better betutu beumer beurre breere bremer bretcu brette breuer brubru bruree brutum bubber bububu bumbee bummer burbet burbur burcer burree burrer burret burutu butere butter butucu c-cube cbterm ceecee cerete cermet ceruce creete cremec cremer cubber cubert cubube cucube cucurb cumber cumbre cumbum cumere cummer curber curete curmur currer curret curter cutcut cuttee cutter ebbert eburru eburum eebree eerect embree embrue embute emeere emeter emeute emmert emmett emmure erbree eretum errett etcetc ettutu eutere m-tree mbembe mccree mccrum mcruer mcteer meerut meeter meetme meetre member membre mememe memere mercer merece merete mermer mermet merrem merret merter merure meteer metrer metrum metter mettet mettur meurce meurte muerte muette mummer murmur murree murter mutere mutter muttur mutuum muumuu r-tree rcrumb rebbec rebeuc rebute recrue rectum recuer recumb recurb recure recurt remeet remete remeue retece reteer reteet retere reterm retree retret retter rettur retube returu reuere reuter reutte reutum rubbee rubber rubrum rubutu rumber rumbur rummer rurutu ruttee rutter rutube t-tree t-tube tectum teebee teemer teerme teetee teeter tembec tembre temere tercer tercet terete termer terrer terret terter tertre tetete tetter teucer tr-rec trebce trebur treece treete tremet tretee trette treuce truett trumbe tubber tumer tummer tumtum turbet turmer turmut turret turrum turtur turucu tururu tuteur tutter tuttut tutume u-tube ucurum ureter urette uteute