b-tree bbbbbb beebee beebem beembe beemen beemer beerme beerne beeter bemeet bement bemete benben beneme benete benett benner bennet bentee benter berbee berber bereet berene berere bermet berner bernet berrer berret bertem bertre beteem betere betete bettee betten better breere bremen bremer brener brenne brette ebbert eebree embnet embree emeere emeter emmene emmert emmett enbene enteer enteme entent enter- entere enterm entete entre- entree entrer erbent erbree erenet ernee errett eterne m-tree mbembe meeten meeter meetme meetre member membre mememe memere meneen meneer mennen mentee merete mermen mermer mermet merner merrem merren merret merten merter meteer metnet metrer metten metter mettet nberet nebber neener nemrem nerrer netmen netter r-tree rebent remeet remene rement remete renner rennet renren rentee renter rerent reteer reteet retene retent retere reterm retree retret retter t-tree teebee teemer teener teerme teetee teeter tembre temene temere tenent tenner tennet tenten tenter tereen terene terete termen termer terner terren terrer terret terter tertre tetete tetter tntnet treben treene treete tremet trenet trenne trente tretee trette ttrent