#3497. Pa2009 Circular Game

The first line of the standard input contains one integer t representing the number of boards to be considered. The following lines contain descriptions of respective boards, each of which consists of three lines. In the first line there are three integers m, b and c (1<=M<=10^9,1<=b,c) separated by single spaces and denoting the length of the board, the number of white pieces and the number of black pieces. In the second line there is an increasing sequence of b integers (in the range 1……m) representing the positions of white pieces. In the third line there is an increasing sequence of integers (in the range 1……m) representing the positions of black pieces. The total number of pieces in all boards does not exceed 10^6.

Exactly lines with answers for consecutive boards should be written to the standard output. The answer is always a single character: B, C, or R, depending on whether the white player wins (B), the black player wins (C) or the game never ends (R).