You will be given a sentence. Check whether the sentence is grammatically correct and is meaningful. If the sentence is grammatically correct, then answer with '1', otherwise answer with '0'.

Input: Consider Input: The average age at which people begin to need eyeglasses vary considerably.

Output: 0


Input: Consider Input: That's a most kind answer that I ever heard.

Output: 0


Input: Consider Input: Bill alleged that Roger had eaten the cake.


Output: 1