fel+na ynde Yde_Yef
fel na ynde yde yef .
v ɛ l WORD_BOUNDARY n a WORD_BOUNDARY ʌ n d ɛ WORD_BOUNDARY ʌ d ɛ WORD_BOUNDARY ʌ ɛ v WORD_BOUNDARY
f e l WORD_BOUNDARY n a WORD_BOUNDARY y n d e WORD_BOUNDARY y d e WORD_BOUNDARY y e f WORD_BOUNDARY