12413번 - Technology Planning (Small1) 스페셜 저지다국어

You are playing a culture simulation game, in which your culture can develop various technologies. Some technologies depend upon others; if technology A depends upon technology B, you cannot develop B until you have developed A. Your culture can work on only one technology at a time.

In the game, you have goals which require particular technologies. You have decided to write a program to help you by planning out the order in which to develop technologies.

The input to your program starts with the number of test cases, T, on a line by itself. T test cases follow. Each one consists of:

• One line with an integer, M, which is the number of technological dependencies.
• M lines, each one containing two technology names, separated by a colon (':'). The first technology depends on the second one.
• One line with an integer, Q, which is the number of goal technologies.
• Q lines, each naming a goal technology.

Each technology name is a sequence of alphanumeric characters (letters or numbers). Technology names are case-sensitive.

Limits

• T ≤ 25
• M ≥ 1
• Q ≥ 1
• There will be no cycles in the dependency graph.
• M ≤ 10
• Q ≤ 10.

The output for each case should start with a line of the form "Case #C: D", where C is the case number, starting from 1, and D is the smallest possible number of technologies that have to be researched. The next D lines should each contain one technology, in the order that they need to be researched.

If there are several possible correct orderings, any one of them is acceptable.