effere effete efreet efter- errett ferfer ferrer ferret fertee ferter fetter freepr frefre frette fterer fterre peepee peeper peerer peeter peetre peffer pepper perere perper perpet perree perret perter pertre peteet petree petrer petter pettet pppppp prefer prefet preffe preter pretre prette r-tree reefer reeffe reeper refeet refeff refert refete refret refter repete repper repref reteer reteet retere retree retret retter t-tree teepee teetee teeter tepper terete terper terrer terret terter tertre tetete tetter treete trefet trefte treppe tretee trette