## I'm a slow walker, but I never walk backwards.

Write a program to read three integers $a$, $b$, and $c$, then print their sum.

## Input Format

There are three lines in the input. The first line has the integer $a$, the second line has the integer $b$, and the third line has the integer $c$.

## Output Format

There is one lines in the output. The line has the sum of $a$, $b$, and $c$.

## Sample Input

123


## Sample Output

6