Task: Program Execution
Input (English): 18, 21, ['i', '393', 'L', '3631', 'O', '3287', '883', 'T', '7867', 'K', '5379', 'Q', 'O', 'P', 'v', 'p', '7891', 'c', '8585', '6183', '1519', 'P', '777']
Output (English): 1519, 6183, 8585, c