Problem Statement

Serval, Fennec, and Raccoon played rock-paper-scissors and had a draw.
You are given characters x and y representing the hand thrown by Fennec and Raccoon, respectively. Here, 0 stands for rock, 1 stands for scissors, and 2 stands for paper.
Print the character corresponding to the hand thrown by Serval, which can be uniquely determined.

Input

Input is given from Standard Input in the following format:
x y

Output

Print the answer, which should be 0 for rock, 1 for scissors, or 2 for paper.

Constraints

• Each of x and y is 0, 1, or 2.

Sample Input 1

0 1

Sample Output 1

2

Fennec threw rock, and Raccoon threw scissors. To have a draw, Serval must have thrown paper.

Sample Input 2

0 0

Sample Output 2

0

Fennec threw rock, and Raccoon threw rock. To have a draw, Serval must have thrown rock.

见题面 Input 部分

见题面 Output 部分