Problem Statement

In the figure shown in the image below, are the points numbered a and b directly connected by a line segment?

Input

Input is given from Standard Input in the following format:
a b

Output

If the points numbered a and b are directly connected by a line segment, print Yes; otherwise, print No.
The judge is case-sensitive: be sure to print uppercase and lowercase letters correctly.

Constraints

• $1 \leq a \lt b \leq 10$
• a and b are integers.

Sample Input 1

4 5

Sample Output 1

Yes

In the figure shown in the Problem Statement, the points numbered 4 and 5 are directly connected by a line segment.
Thus, Yes should be printed.

Sample Input 2

3 5

Sample Output 2

No

In the figure shown in the Problem Statement, the points numbered 3 and 5 are not directly connected by a line segment.
Thus, No should be printed.

Sample Input 3

1 10

Sample Output 3

Yes

见题面 Input 部分

见题面 Output 部分