Task: Program Execution
Input (English): 1, 4, ['P', '3725', 'Q', '2859', 'r', 'e', 'z', '8387', '6789', 'a', '3329', '7049', 'M', 'r', '3027', '1341', '4481', '4725', '7739', 'h']
Output (English): P, r, 6789, M, 4481