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: Tabs were kept on all persons entering the station.

Output: 1


Input: Consider Input: Crystal vases break easily.

Output: 1


Input: Consider Input: With their teacher, the kids have arrived safely, haven't they?


Output: 1