me duele la cabeza
me duele la cabeza .
m e̞ WORD_BOUNDARY d w e̞ l e̞ WORD_BOUNDARY l a WORD_BOUNDARY k a β e̞ s a WORD_BOUNDARY
m e WORD_BOUNDARY d u e l e WORD_BOUNDARY l a WORD_BOUNDARY c a b e z a WORD_BOUNDARY . WORD_BOUNDARY