b-tree bbbbbb beebee beebem beembe beemer beerme beeter behete behter bemeet bemete berbee berber bereet berere berhet bermet berrer berret bertem berthe bertre beteem betere betete bettee better breere breeth brehme bremer brethe brette bthree ebbert ebbeth eebree embree emeere emeter emmert emmett erbree ermthe erreth errett ethere ethete hebete heebee heehee heeter hehehe hehheh hemmer hemmet herber herbet herher herme hermeh hermet herrem herter herthe hertme heter- hether hetter m-tree mbembe meeter meetme meetre mehter member membre mememe memere merete mermer mermet merrem merret merter merthe meteer meteth mether metrer metter mettet mm-hmm mthree r-tree rehber rehete remeet remete reteer reteet retere reterm rethem rether retree retret retter t-tree te-hee tebeth teebee teehee teemer teerme teerth teetee teeter teethe tembre temere terete termeh termer terrer terret terter tertre tetete tethee tether tetteh tetter themer themet therm- therme thetee thethe threet threte thrett treete trehet tremet tretee trette