debe ser un helicóptero
debe ser un helicóptero .
d e̞ β e̞ WORD_BOUNDARY s e̞ ɾ WORD_BOUNDARY u n WORD_BOUNDARY e̞ l i k o̞ p t e̞ ɾ o̞ WORD_BOUNDARY
d e b e WORD_BOUNDARY s e r WORD_BOUNDARY u n WORD_BOUNDARY h e l i c ó p t e r o WORD_BOUNDARY . WORD_BOUNDARY