b-tree bbbbbb beebee beegee beerze beeter beezer begger behete behter berbee berber bereet berege berere berger berhet berrer berret berthe bertre betere betete bettee better betzet bezeth breege breere breeth breeze breger bregge brethe brette bthree bzhete ebbert ebbeth eebree eez-eh egbere egbert eggert erbree erreth errett etgert ethere ethete etrez gbegbe gebbet gebert geegee geertz geezer gegger gerber gerege gerger gerret gerthe gertte gether getter gheber ghebre greete greetz greeze greger gregge gregre greter grethe grette gteter heberg hebete heebee heeger heehee heeter hehehe hehheh herber herbet herge herger herget herher herter herthe heter- hether hetter hetzer hezreh hhgttg r-tree regehr regret rehber rehete reteer reteet retere rether retree retret retter t-tree te-hee tebeth teebee teehee teerth teetee teeter teethe tegher terete terrer terret terter tertre terzet tetete tethee tether tetteh tetter theegg thetee thethe thgttg threeg threet threte thrett treete treget trehet tretee trette tzetze zeebee zegrze zehrer zerbet zertz zezere zheger