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第一個zju的acm程式(ID:1001)

A + B Problem
Time Limit: 2 Seconds      Memory Limit: 65536 KB

Calculate a + b

Input

The input will consist of a series of pairs of integers a and b,separated by a space, one pair of integers per line.

Output

For each pair of input integers a and b you should output the sum of a and b in one line,and with one line of output for each line in input.

Sample Input

1 5

Sample Output

6

Hint

Use + operator