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'.

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

Ex Output:
0


Ex Input:
Bill was bitten the dog.

Ex Output:
0


Ex Input:
The professor talked us into a stupor.

Ex Output:

1