The input weekday is 1 if it is a weekday, and the input vacation is 1 if we are on vacation. We sleep in if it is not a weekday or we're on vacation. print true if we sleep in.

Input

You are given n, k separated by space, where 0 <= n, k <= 1.

Output

Print true if we sleep in, or false if we don't.

Example

Input:
0 0

Output:
true

Input:
1 0

Output:
false

Input:
0 1

Output:
true