Task: Program Execution
Input (English): 1, 9, ['4181', 'B', 't', '4981', '9749', 'x', '7813', 'H', '8735', '8839', '6627', 'U', 'k', 'B', 'i', '7527', 'J', 'v', '677', '6011']
Output (English): 4181, 8839, 677