Problem Statement

A basketball game is being played, and the score is now X-Y. Here, it is guaranteed that $X \neq Y$.
Can the team which is behind turn the tables with a successful three-point goal?
In other words, if the team which is behind earns three points, will its score become strictly greater than that of the other team?

Input

Input is given from Standard Input in the following format:
X Y

Output

If the team which is behind can turn the tables with a successful three-point goal, print Yes; otherwise, print No.

Constraints

• $0 \le X \le 100$
• $0 \le Y \le 100$
• $X \neq Y$
• X and Y are integers.

Sample Input 1

3 5

Sample Output 1

Yes

The team with 3 points is behind.
After a successful 3-point goal, it will have 6 points, which is greater than that of the other team - 5.
Thus, we should print Yes.

Sample Input 2

16 2

Sample Output 2

No

The gap is too much. The team which is behind cannot overtake the other by getting 3 points.

Sample Input 3

12 15

Sample Output 3

No

A 3-point goal will tie the score but not turn the tables.

见题面 Input 部分

见题面 Output 部分