b-tree bbbbbb beebee beeter behete behter berbee berber bereet berere berhet berrer berret berthe bertre berube betere betete betrue bettee better betutu beurre breere breeth brethe brette breuer brubru bruree bthree bubber bububu buhrer burbet burbur burree burrer burret burutu butere butter butthe ebbert ebbeth eburru eebree erbree erreth errett ethere ethete ettutu eutere hebbur hebete heebee heehee heeter hehehe hehheh herber herbet herher herter herthe heter- hether hetter heurte heutte htruth hubber hubbub hubert hububb hueber huetre huh-uh hurrer hurter hurth huthur huthut hutter r-tree rebute rehber rehete reheur reteer reteet retere rether retree retret retter rettur retube returu reuere reuter reuthe reutte rubbee rubber rubutu rurutu ruther ruttee rutter rutube t-tree t-tube te-hee tebeth teebee teehee teerth teetee teeter teethe terete terrer terret terter tertre tetete tethee tether tetteh tetter thehub thehue therub thetee thethe thettu threet threte thrett thurte trebur treete trehet tretee trette treuth trueth truett tubber turbeh turbet turbhe turret turtur tururu tuteur tuther tutter tuttut u-tube uh-huh ureter urette uteute