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First, start by reading the problem statement for Contest Scoreboard. The input format is the same. For this prelude, you will be simply reading the input and printing it out in the format specified.
Each input line is a four-tuple: contestant number, problem number, time of submission, and result code (L).
1 2 10 I 3 1 11 C 1 2 19 R 1 2 21 C 1 1 25 C