Problem Statement

Takahashi has rolled three dice. They are showing numbers $a$, $b$, and $c$ on the top faces.

Find the sum of the numbers on the bottom faces.

Here, each of these dice is a standard cubic die, where the sum of the numbers on opposite faces is $7$.

Constrains

• $1 \\leq a, b, c \\leq 6$
• All values in input are integers.

Input

Input is given from Standard Input in the following format:

$a$ $b$ $c$

Output

Print the sum of the numbers on the bottom faces of the three dice.

Sample Input 1

1 4 3

Sample Output 1

13

The numbers on the bottom faces are $6$, $3$, and $4$. We have $6 + 3 + 4 = 13$, which should be printed.

Sample Input 2

5 6 4

Sample Output 2

6