b-tree bbbbbb beebee beeker beeter behete behter bekker berbee berber bereet bereke berere berhet berker berkut berrer berret berthe bertre berube betere betete bethke betrue bettee better betutu beurre breere breeth brekke brethe brette breuer brubru bruker bruket bruree bthree bubber bububu buhrer bukett bukkur bukuru burbet burbur burket burkut burree burrer burret buruku burutu butere butter butthe ebbert ebbeth eburru eebree erbree erketu erreth errett ethere ethete ettutu eutere hebbur hebete heebee heehee heeter hehehe hehheh herber herbet hereke herher herter herthe heter- hether hetter heurte heutte htruth hubber hubbub hubert hububb hueber huetre huh-uh hurrer hurter hurth huthur huthut hutter k-tree kebber keeker kehrer kekkut kerber kereru kerker kerkuk kertee kerteh kether ketter ketuke keuruu khrber kreker kretek kreuth kubeer kukere kurree kurukh kururu kutke kutter r-tree rebuke rebute reeker rehber rehete reheur rekrut reteer reteet retere rether retree retret retter rettur retube returu reubke reuere reuter reuthe reutte rubbee rubber rubutu rukutu rurkee rurutu ruther ruttee rutter rutube t-tree t-tube te-hee tebeth teebee teehee teerth teetee teeter teethe tekkeh tekrur terete terrer terret terter tertre tetete tethee tether tetteh tetter thehub thehue thekte therub thetee thethe thettu threet threte thrett thurte tkhkut trebek trebur treete trehet treker tretee trette tretuk treuth trueth truett truker tubber tuktuk turbeh turbet turbhe turker turret turtuk turtur tururu tuteur tuther tutter tuttut u-tube uh-huh ureter urette uteute utukku utukur