Description

What's the most program does people write when they first learn programming.Is it "Hello World！"？No it's A+B Problem.Now you should slove it in the contest as fast as you can.

Input

two integers(the absoulate value of them will not exceeds 1*10^9)

Output

the sum of the two numbers

Sample Input

2 3
4 7
9 9

Sample Output

5
11
18

HINT

Source

宁大第三届院赛