b-tree bbbbbb becker becket becure beebee beefer beeker beeter befree befret befuck bekker berbee berber bercke bereet bereft bereke berere berker berkut berrer berret bertre berube betere betete betrue bettee better betutu beurre breefe breere brekke bretcu brette breuer brubru brufut bruker bruket bruree bubber bububu bucker bucket buffer buffet bukett bukkur bukuru burbet burbur burcer burfee burket burkut burree burrer burret buruku burutu butere butter butucu c-cube ceecee cerete ceruce creeke creete creket cubber cubeck cubert cubube cucube cucurb cuffee cuffer curber curete curfur currer curret curter cutcut cuttee cutter ebbert eburru eckert eebree eerect efecte effect effere effete effutu efreet efter- erbree erfurt erketu errett etcetc ettutu eutere fecker fecket fekete ferber ferfer ferrer ferret ferrur fertee fertek ferter fetter feture feuter frefre frette freure fructe fterer fterre fuckee fucker fuerte furber furfur furrer furrfu futret futter future k-tree kebber keefer keeffe keeker kekkut kerber kereft kereru kerker kerkuk kertee ketter ketuke keuruu krefft kreker kretek krueck kubeer kukere kurkcu kurree kururu kutke kutter r-tree rebbec rebeck rebeuc rebuck rebuff rebuke rebute recrue recuer recurb recure recurt reefer reeffe reeker refect refeet refeff refert refete refret refter refuce refuck refurb refute rekrut retece reteer reteet retere retree retret retter rettur retube returf returu reubke reuere reuter reutte rubbee rubber rubutu rucker rufete ruffec ruffer ruffet rufter rukutu rurkee rurutu ruttee rutter rutube t-tree t-tube teebee teetee teeter teeuck tekfur tekrur terbuf tercer tercet terete terrer terret terter tertre tetete tetter teucer tr-rec trebce trebek trebur treck- treece treete trefet trefte treker tretee trette tretuk treuce truett trufte truker tubber tucker tucket tuffet tufter tuktuk turbet tureck turfer turker turret turtuk turtur turucu tururu tuteur tutter tuttut u-tube uecker ufreet ureter urette uruffe uteute utukku utukur