ceecee cerete ceruce creete cuffee cuffer curete curfur currer curret curter cutcut cuttee cutter eerect efecte effect effere effete effutu efreet efter- erfurt errett etcetc ettutu eutere ferfer ferrer ferret ferrur fertee ferter fetter feture feuter frefre frette freure fructe fterer fterre fuerte furfur furrer furrfu futret futter future r-tree recrue recuer recure recurt reefer reeffe refect refeet refeff refert refete refret refter refuce refute retece reteer reteet retere retree retret retter rettur returf returu reuere reuter reutte rufete ruffec ruffer ruffet rufter rurutu ruttee rutter t-tree teetee teeter tercer tercet terete terrer terret terter tertre tetete tetter teucer tr-rec treece treete trefet trefte tretee trette treuce truett trufte tuffet tufter turfer turret turtur turucu tururu tuteur tutter tuttut ufreet ureter urette uruffe uteute