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

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

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