Task: Program Execution
Input (English): 7, 17, ['6247', '6655', 'g', 'm', '8745', 'W', 'U', 'L', 'i', '2621', 'f', 't', 'I', 'r', '2141', '7611', 'W', 'o']
Output (English): ULi2621ftIr21417611W