#描述#
Your task is to Calculate a + b.

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

##输出格式##
For each pair of input integers a and b you should output the sum of a and b, and followed by a blank line.

#样例1#
##样例输入1##

1 5
10 20

##样例输出1##

6

30

#限制#
1000ms
32768KB

#提示#

#来源#
HDU