Question

Is there carry?

You're given two numbers A and B. On A+B, if there's a carry in this operation print "Yes" else "No". (Case specific)

Input

The input contains two space separated numbers: A, B

Constraints
A and B are integers.
1 ≤ A, B ≤ 10^18

Output

If the calculation does not involve a carry, print "No"; if it does, print "Yes".

Example

Sample Input 1
229 390
Sample Output 1
Yes

Sample Input 2
1234 4321
Sample Output 2
No

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