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## 题目描述

I have a very simple problem for you. Given two integers A and B, your job is to calculate the Sum of A + B.

## 输入

The first line of the input contains an integer T(1<=T<=20) which means the number of test cases. Then T lines follow, each line consists of two positive integers, A and B. Notice that the integers are very large, that means you should not process them by using 32-bit integer. You may assume the length of each integer will not exceed 1000.

## 输出

For each test case, you should output two lines. The first line is "Case #:", # means the number of the test case. The second line is the an equation "A + B = Sum", Sum means the result of A + B. Note there are some spaces in the equation. Output a blank line between two adjacent test cases.

## 样例输入

4
1 2
112233445566778899 998877665544332211
998 2
4568 0012


## 样例输出

Case 1:
1 + 2 = 3

Case 2:
112233445566778899 + 998877665544332211 = 1111111111111111110

Case 3:
998 + 2 = 1000

Case 4:
4568 + 0012 = 4580


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