b-tree bbbbbb beebee beerne beeter behete behter benben benete benett benner bennet bentee benter berbee berber bereet berene berere berhet berner bernet berrer berret berthe bertre betere betete bethen bettee betten better breere breeth brener brenne brethe brette bthree ebbert ebbeth eebree eethen enbene enhere enteer entent enter- entere entete entre- entree entrer erbent erbree erenet ernee erreth errett eterne ethene ethere ethete ethren hebben hebene hebete hebner heebee heehee heeren heernt heeter hehehe hehheh hennen henner henree henter herber herbet herent herher hernen herner hernet herren herten herter herthe heter- hethen hether hetten hetter nberet nebber neener nehren nerrer nethen nether netter nhrtbt r-tree rebent rehber rehete renner rennet renren rentee renter rerent reteer reteet retene retent retere rethen rether retree retret retter rhenen t-tree te-hee tebeth teebee teehee teener teenth teerth teetee teeter teethe tenent tenner tennet tenten tenter tenthe tereen terene terete terner terren terrer terret terter tertre tetete tethee tether tetteh tetter theben thenet thenhe thenne thennt therne thetee thethe threen threet threne threte thrett tntnet treben treene treete trehet trenet trenne trente tretee trette ttrent