b-tree bbbbbb becher bechet beebee beeter behete behter berbee berber berche bereet berere berhet berrer berret berthe bertre betere betete bettee better brecht breech breere breeth bretch brethe brette bthree ceecee cerete chebec chebet cheche cheech cheere cherch cheree cheret cherre cherte creche creech creete crethe ebbert ebbeth eebree eerect erbree erche- erreth errett etcetc etcher ethere ethete hebete hecche hecher heebee heehee heerce heeter hehehe hehheh herber herbet herher herter herthe hetche heter- hether hetter hrebec r-tree rebbec recche reetch rehber rehete retche retece retech reteer reteet retere rether retree retret retter t-tree te-hee tebeth tecche techch teebee teehee teerth teetee teeter teethe tercer tercet terete terrer terret terter tertre tetche tetete tethee tether tetteh tetter thebbc theche thetch thetee thethe threet threte thrett tr-rec trebce treche treece treete trehet tretee trette