b-tree bbbbbb beebee beerne beeter benben benete benett benner bennet bentee benter berbee berber bereet berene berere berner bernet berrer berret bertre betere betete bettee betten better bjerre breere brener brenne brette ebbert eebree enbene enteer entent enter- entere entete entre- entree entrer erbent erbree erenet ernee errett eterne jebbet jeeben jeerer jenner jennet jernej jettee jetter nberet nebber neejee neener nerrer netjet netter r-tree rebent renner rennet renren rentee renter rerent reteer reteet retene retent retere retnje retree retret retter t-tree teebee teener teetee teeter tenent tenner tennet tenten tenter tereen terene terete terner terren terrer terret terter tertre tetete tetter tjejer tntnet treben treene treete trenet trenne trente tretee trette ttrent