es dura la cabeza
es dura la cabeza ?
e̞ s WORD_BOUNDARY d u ɾ a WORD_BOUNDARY l a WORD_BOUNDARY k a β e̞ s a WORD_BOUNDARY
e s WORD_BOUNDARY d u r a WORD_BOUNDARY l a WORD_BOUNDARY c a b e z a WORD_BOUNDARY ? WORD_BOUNDARY