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문제

It’s the end of the year for Hunt Valley Elementary. Everyone passed their classes and is moving forward a grade; update everyone’s grade level in the database. Kindergarden is represented by a 0, First grade by a 1, and so on. The Hunt Valley Elementary is a K-6 school. Only print out student’s grade levels who are still at Hunt Valley Elementary.

입력

The first line of input is a number, n, representing the number of test cases. Each case will start with a number, m, representing the number of entries in that test case followed by a list of m integers between 0 and 6, with each number on its own line. There will be anywhere from 1 to 500 test cases with anywhere from 1 to 500 students per case

출력

For each case, output the line “Case x:” where x is the case number, on a single line, followed by a list of integers, each on a new line, between 1 and 6. If the student has graduated from the school, do not print them.

예제 입력

3
10
6
1
2
3
6
6
6
1
0
0
2
1
1
1
6

예제 출력

Case 1:
2
3
4
2
1
1
Case 2:
2
2
Case 3:

힌트