4. Add Three Numbers

Task Description

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 line in the output. The line has the sum of $a$, $b$, and $c$.

Sample Input

1
2
3

Sample Output

6