eerier effeir effere effete efreet efter- eifert er-rif errett etrez feerie feifer feirie ferez ferfer ferier ferrer ferret ferrez ferri- ferrie ferriz fertee ferter fetter fetzer fiefie fierte fierze fiftie firret fitter fittie fittit fizzer freeez freeze frefre freire frette frieze fritzi frizer frizzi fterer fterie fterre i-free i-tree iffier ifreet irrite ittiri r-tree reefer reeffe refeet refeff refert refete refire refize refrei refret refter reiter reizei reteer reteet retere retief retire retree retret retter rieter riette rietti riffer rififi rifter rititi ritter t-tree teetee teeter teirei terete terfez terizi terrer terret terrie terrif territ terter tertre terzet tetete tetter tiefer tierer tieret tiete tietie tietze tiff-f tiriez tirret tirrit titfer titiri tittee titter tittie treete trefet trefte treife treitz treize tretee tretie trette trifet triter tzetze zefiri zeriff zertz zezere zierer ziffer zrizer