e-four eerier effeir effere effoff effore eforie er-rif errori errour euerie eururo f-zero feerie feeror feifer feirie feizor feofor ferez ferfer ferier ferior feroze ferrer ferrez ferri- ferrie ferriz ferro- ferrur fiefie fierro fierze firouz firuzi fizzer foerre foofoo foofur foozer foreui forrer forure foufou fourer fourie fourof fourou fozzie freeez freeof freeze frefre freire freure frieze frizer frizzi froofe fufore furfie furfur furore furour furrer furrfu i-free ier-oe ierror iezeru iffier iiooio ioffer irereo irrour izeure oferre offire offrir oooooo oozier orrour ouerre ouioui ouzeri ozieri oziroe ozzero reefer reeffe refeff refire refize refrei reizei reroof reueir reuere reuire reuour riffer rififi riuere roeier roiffe roofer roofie roozer rouffe rouzer rozier rozzer ruffer ruffie ruzizi uffizi urouer uroure uruffe zefiri zefiro zeriff zezere zierer ziffer zoozoo zorzor zouzou zrizer