e-text effere effete effutu efreet efter- erfurt errett etreux ettutu eutere exeter ferfer ferrer ferret ferrex ferrur fertee ferter fetter feture feuter frefre frette freure frutex fterer fterre fuerte furfur furrer furrfu futret futter future r-tree reefer reeffe refeet refeff refert refete refret refter reftex refute reteer reteet retere retree retret retter rettur returf returu reuere reuter reutte rufete ruffer ruffet rufter rurutu ruttee rutter t-tree teetee teeter terete terrer terret terrex terter tertre tetete tetter texter treete trefet trefte tretee trette truett trufte trutex tuffet tufter turfer turret turtur tururu tuteur tutter tuttut ufreet ureter urette urtext uruffe uteute x-tree xerert