b-tree bbbbbb becker becket beebee beegee beeker beeter begec begeck begger bekker berbee berber bercke bereet berege bereke berere berger berker berrer berret bertre betere betete bettee better bgtbcc breege breere breger bregge brekke brette ceecee cerete creeke creete creket ebbert eckert eebree eerect egbere egbert eggert ekberg erbree ercege errett etcetc etgert gbegbe gebbet gebert gecker geegee gegger gekker gerber gerege gerger gerret gertte getter greece greete greger gregge gregre greter grette gteter k-tree kebber keeker kegger kerber kerker kertee ketter kregbe kreker kretek r-tree rebbec rebeck reeker regret retece reteer reteet retere retree retret retter t-tree teebee teetee teeter tercer tercet terete terrer terret terter tertre tetete tetter tr-rec trebce trebek treck- treece treete treget treker tretee trette