Task: Program Execution
Input (English): 4, 6, ['Z', 'U', '915', 'x', 'V', '775', '5473', 'H', 'R', '8371', '1337', '7219', '4151', 'K', 'H', '835', 'b', 'A', 'R', '8665', 'd', 'L', '1449']
Output (English): x, 8371, 835, L