Task: Program Execution
Input (English): 1, 3, ['837', 'I', '6847', '8715', '4053', '4071', '9321', '8241', '9139', '5449', '5131', '6979', '6593', '2031', '3749', '4645', '7043', 'z', '503', 'O']
Output (English): 837, 8715, 9321, 5449, 6593, 4645, 503