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:
What do you believe that iron is to be a fact well known to virtually everybody?

Ex Output:
0


Ex Input:
We are knowing this theory.

Ex Output:
0


Ex Input:
John hit the stone against the wall.

Ex Output:

1