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:
Who did Mary see walking toward the railroad station?

Ex Output:
1


Ex Input:
Tom picked these grapes, and I washed these grapes, and Suzie will prepare these grapes.

Ex Output:
1


Ex Input:
The medium contains ions.

Ex Output:

1