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Given two integers numbers N and K, the Geek wants you to find f(f(..........f(N))) K times, where f(x) = x XOR (x%10).
Note: XOR represents bitwise xor operation
Input:
1. The first line of the input contains a single integer T denoting the number of test cases. The description of T test cases follows.
2. The first line of each test case contains two integers N and K.
Output: For each test case, print the answer
Constraints:
1. 1 <= T <= 10
2. 1 <= N <= 105
3. 1 <= K <= 109
Example:
Input:
2
17 1
66 3
Output:
22
74
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