Software Bugs#4153
Not all bugs are insects. There are also certain kinds of bugs that may become a real nightmare for software developers. You definitely know the situation when a user calls to say: "Hey, I've found a bug in your program." Once you have located and removed the bug, another one appears immediately. It is a hard and never-ending process.
Recently, there has appeared a promising open-source initiative called the Bug Preprocessor. The preprocessor is a program able to find all bugs in your source code and mark them, so they are relatively easy to remove. Your task is to write a program that will remove all marked bugs from the preprocessed source code.
The input contains several test cases. Each test case starts with a line containing one integer (0 \leq t \leq 100000), one space, and a string used by the preprocessor to mark all bugs. The next lines contain the preprocessed source code. All bugs are represented by a case-sensitive string . Each line of the input will be between and characters long. The bug marker consists of at least and at most uppercase letters ("A" through "Z").
Your program must remove all of the bugs and produce the same result as if the first occurrence of on each line was removed repeatedly, until there is no other existing occurrence of . Nothing else may be removed, not even spaces.
Example 1