Task: Program Execution
Input (English): 7, 13, ['X', '3913', 't', '8133', '2043', 'I', '4471', 'i', '9359', 'h', 'e', 'g', '6573', '4347', 'D', 'O', '6071', 'X']
Output (English): 4471i9359heg6573