Problem 1091. -- A+B for Input-Output Practice (III)

HDU_1091: A+B for Input-Output Practice (III)

Time Limit: 1000 MS  Memory Limit: 32 MB   64bit IO Format: %I64d
Submitted: 123  Accepted: 80
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Your task is to Calculate a + b.


Input contains multiple test cases. Each test case contains a pair of integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed.


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
10 20
0 0

Sample Output


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