Task: Program Execution
Input (English): 18, 20, ['3427', '3805', 'b', 'U', '9045', 'A', 'p', '1361', 'j', 'L', 'j', 'q', 'V', 'x', 'O', 'S', 'v', 'w', 'P', 'R', 'N', '6955']
Output (English): RPw