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: Carla hit Bill's back.

Output: 1


Input: Consider Input: Not many books survived the fire, did they?

Output: 1


Input: Consider Input: It was believed that the earth was round.


Output: 1