de-err dedute deeded deedee deeder deeked dekker derere derker derrer derure detekt deterr detete detter deuter dreder dudder duerer dueted duetee duette durkee duttee erketu errett ettutu eutere k-tree keeked keeker kekkut kereru kerker kerkuk kertee ketter ketuke keuruu kreker kretek kuduru kukere kukurd kurree kururu kutke kutter r-tree redded redder reddur redere redred redted redure reeded reeder reeked reeker rekrut reteed reteer reteet retere retree retret retted retter rettur returu reuere reuter reutte rudder rudrur rukerd rukutu rurkee rurutu rutted ruttee rutter t-tree tedded tedder tedure teeder teetee teeter tekrur terete terrer terret terter tertre tetede tetete tetter treder treete treker tretee trette tretuk truett truker tudder tuderk tuktuk turker turret turtuk turtur tururu tuteur tutted tutter tuttut udukku urdeur ureter urette uteute utukku utukur