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:
Willy is taller than I know a boy who is.

Ex Output:
0


Ex Input:
This key won't open the Jock.

Ex Output:
1


Ex Input:
This book just sells itself.

Ex Output:

1