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: Willy is taller than I know a boy who is.

Output: 0


Input: Consider Input: Mary has never kissed a man who is taller than John.

Output: 1


Input: Consider Input: It is vital that we will study everyday.


Output: 0