b-tree bbbbbb beebee beerze beeter beezer berbee berber bereet berere berrer berret bertre betere betete bettee better betzet breere breeze brette brzece ceecee cerete creete creeze czerce ebbert eebree eerect erbree errett etcetc etrez r-tree rebbec retece reteer reteet retere retree retret retter t-tree teebee teetee teeter tercer tercet terete terrer terret terter tertre terzet tetete tetter tr-rec trebce treece treete tretee trette tzetze zeebee zerbet zertz zezere zrece