effere effete effutu efreet efter- erfurt errett ettutu eutere everte ferfer ferrer ferret ferrur fertee ferter fetter feture feuter freetv frefre frette freure fterer fterre fuerte furfur furrer furrfu futret futter future r-tree reefer reeffe reever refeet refeff refert refete refret refter refute reteer reteet retere retree retret retter rettur returf returu reuere reuter reutte reuver revere revert revver rufete ruffer ruffet rufter rurutu ruttee rutter t-tree teetee teeter teevee terete terrer terret terter tertre tetete tetter tevere treete trefet trefte tretee trette trevet truett trufte tuffet tufter turfer turret turtur tururu turver tuteur tutter tuttut tuvvur ufreet ureter urette uruffe uteute uuvere veerer verree verrer verret verrue vertre vertue verver vervet vetere vetter vvvvvv