FERTILEST

ef el er es et fe if is it li re si ti

eel efs eft elf els ere ers fee fer fes fet fie fil fir fit ifs ire its lee lei les let lie lis lit ree ref rei res ret rif see sei sel ser set sir sit sri tee tel tet tie til tis tit

eels efts else erst feel fees feet felt fere fest fete fets file fils fire firs fist fits flee flir flit free fret frit ires isle leer lees leet left leis lest lets lief lier lies life lift lire list lite lits reef reel rees refs reft reif reis rest rete rets riel rife rifs rift rile rise rite seel seer seif self sere serf sett sift silt sire site slit stet stir teel tees tele tels test tets tier ties tile tils tilt tire tirl tits tree tref tres tret