ceecee cerete creete ctcpec eerect efecte effect effere effete efreet efter- errett etcetc ferfer ferrer ferret fertee ferter fetter freepr frefre frette fterer fterre peepee peeper peerce peerer peeter peetre peffer pepper percee percer perere perper perpet perree perret perter pertre pet-ct peteet petree petrer petter pettet pppppp preece prefer prefet preffe preter pretre prette r-tree recept reefer reeffe reeper refect refeet refeff refert refete refret refter repete repper repref retece reteer reteet retere retree retret retter t-tree teepee teetee teeter tepece tepper tercer tercet terete terper terrer terret terter tertre tetete tetter tr-rec treece treete trefet trefte treppe tretee trette