b-tree bbbbbb bedded bedder bedebt beduru beebee beedee beeped beeper beerde beeter berbee berber berede bereet berere berrer berret bertre berube betere betete betrue betted bettee better betutu beurre bredde breded breder breede breere brette breuer brubru bruder brudet brurde bruree bruted bubber bububu budded budder burbet burbur burder burdet burdur burped burpee burper burred burree burrer burret burrup burutu butere butted butter dbette de-err debdeb debere debert debete debret debted debtee deburr dedupe dedute deeded deedee deeder deeper depere depper depree depure depute derere derped derrer derure deterr detete detter deturb deubre deuter dreder drepte drpdre druber dubbed dubber dubdub dudder dudeup duerer dueted duetee duette dupped dupper dupre dupree duttee ebbert eburru eebree eperdu erbree errett ettutu eutere pberet pebete pedder peddur peedee peeped peepee peeper peered peerer peeter peetre pepped pepper perdue perere peretu perper perpet perree perret perter pertre petbed peteet peterd peteru petree petrer petrud petted petter pettet pppppp ppt-db preede preeue prepub preter pretre prette preue- pruett pubbed pubber puddee pudder pudere pudeur puerer pupped puppet pupput purdue pure-d pureed purete purpre purpur purred purree purrer put-up putput putred putrer putted puttee putter puttur puture r-tree rebred rebute redbed redbud redded redder reddur redere redred redted redure reeded reeder reeper repete repped repper repted repure repuru repute reteed reteer reteet retere retree retret retted retter rettur retube returu reuere reuter reutte rub-up rubbed rubbee rubber rubutu rudder rudrur rupert rurutu rutted ruttee rutter rutube t-tree t-tube tebedu tedded tedder tedure teebee teeder teedup teepee teerpu teetee teeter tepper terete terped terper terrer terret terter tertre tetede tetete tetter trebur treder treete treppe tretee trette truett trueup tubbed tubber tudder tupped tuppee tupper turbet turret turtur tururu tuteur tutted tutter tuttut u-tube ubered udburu up-put upbred upbrud urdeur ureter urette uruppu uteute