Problem Statement

As shown in the figure below, there are $12$ points placed at equal intervals on a circle. The points are numbered $0, 1, 2, \dots, 11$ in clockwise order.

Shirotsume chose $3$ distinct points $X, Y, Z$ from among these points and connected each pair with a line segment to form an equilateral triangle.

Given $X, Y$, find $Z$.

Constraints

• All input values are integers.
• $0 \leq X \leq 11$
• $0 \leq Y \leq 11$
• $X \neq Y$
• The input is guaranteed to be such that there exists a $Z$ for which the triangle formed by connecting points $X, Y, Z$ with line segments is an equilateral triangle.

Input

The input is given from standard input in the following format.

$X$ $Y$

Output

Output the integer $Z$ $(0 \leq Z \leq 11)$ that is the answer.

End the output with a newline.

Sample

Sample 1

Input

0 4

Output

8

Taking $(X, Y, Z) = (0, 4, 8)$ forms an equilateral triangle, as shown in the figure below.

Sample 2

Input

11 7

Output

3

Taking $(X, Y, Z) = (11, 7, 3)$ forms an equilateral triangle, as shown in the figure below.

Sample 3

Input

6 10

Output

2

Taking $(X, Y, Z) = (6, 10, 2)$ forms an equilateral triangle, as shown in the figure below.