b-tree bbbbbb bedded bedder bedebt beebee beedee beerde beeter berbee berber berede bereet berere berrer berret bertre betere betete betted bettee better bjerre bredde breded breder breede breere brette dbette de-err debdeb debere debert debete debret debted debtee deeded deedee deeder derere derrer deterr detete detter dreder ebbert eebree erbree errett jebbet jeberd jeered jeerer jeqjeq jereed jetted jettee jetter qerret r-tree rebred redbed redded redder redere redjet redred redted reeded reeder reteed reteer reteet retere retree retret retted retter t-tree tedded tedder teebee teeder teetee teeter terete terrer terret terter tertre tetede tetete tetter tjejer treder treete tretee trette