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: Bill didn't confirm that Roger had eaten anything.

Output: 0


Input: Consider Input: The guide has been taken John to the library.

Output: 0


Input: Consider Input: Every politician is worried when the press starts attacking him.


Output: 1