Task: Program Execution
Input (English): 2, 5, ['w', '8509', 'f', 'f', 'l', '1045', 'X', '7231', '9939', 'O', '5497', 'u', 's', 'X', 'O', 'g', '8511', '2919', 'b', '4179']
Output (English): 8509, X, u, 8511