Give you two number a, b. Output the smallest number that can be added to a to contain the number b as a substring.
输入解释
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
输出解释
For each test case: output the case number as shown and the smallest number that satisfy the description.