Instructions: In this task, you are given a paper review. Based on the review, your job is to identify language and generate "en" if the review is in English or generate "es" if the review is in Spanish. Note that URLs in the text have been replaced with [Link].
Input: Un buen aporte y mirada al futuro. La redaccion presenta algunas dificultades, revisar. Falta dar un ejemplo para algun tipo de dispositivo, habria sido ideal.
Output:
es