Task: Program Execution
Input (English): 15, 18, ['W', 'j', 'c', '5265', 'o', 'D', '2787', '7025', '7353', 'N', 'k', 'z', '7911', '5035', '7427', 'L', 'w', 'C', '597', '1513', 'x', 'm', 'U', 'z', '807', '4743']
Output (English): 7427LwC