Task: Program Execution
Input (English): 18, 21, ['L', '8503', 'o', 'U', '6399', '2279', '6859', '6107', 'W', 'E', 'K', '413', 'q', '5253', 'E', '217', 'c', '4285', 'E', '711', '1809']
Output (English): 4285, E, 711, 1809