Problem Statement

Takahashi is in a building with 100 floors.
He uses the stairs for moving up two floors or less or moving down three floors or less, and uses the elevator otherwise.
Does he use the stairs to move from floor X to floor Y?

Input

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

Output

If Takahashi uses the stairs for the move, print Yes; if he uses the elevator, print No.

Constraints

• $1 \leq X,Y \leq 100$
• $X \neq Y$
• All input values are integers.

Sample Input 1

1 4

Sample Output 1

No

The move from floor 1 to floor 4 involves going up three floors, so Takahashi uses the elevator.

Sample Input 2

99 96

Sample Output 2

Yes

The move from floor 99 to floor 96 involves going down three floors, so Takahashi uses the stairs.

Sample Input 3

100 1

Sample Output 3

No

见题面 Input 部分

见题面 Output 部分