Substring

Give you two number a, b. Output the smallest number that can be added to a to contain the number b as a substring.

The first line contains a single positive integer T( T <= 500 ), indicates the number of test cases.
For each test case: Two number a,b;
  0 <= a <= 10^100, 0 <= b <= 10^7

For each test case: output the case number as shown and the smallest number that satisfy the description.

2
9 1
9 2

Case #1: 1
Case #2: 3

2011 Multi-University Training Contest 9 - Host by BJTU