The first line of input is a single number T(T ≤ 100),means the number of test cases.Then T cases

followed, each case contains only one line with two integers A and B(0 ≤ A;B ≤ 100).

For each test case,you should output one line. First, output “Case #t: ”, t means the number of

the test case which is from 1 to T. Then, output an integer indicates the value of |a − b|.