Task: Program Execution
Input (English): 1, 6, ['851', '6545', 'c', '253', 'k', 'X', 'a', 'B', '7083', 'k', '8815', 'u', 'x', 'i', '1575', '5197', 'X', '5203', '3349', '841', '7301', 'G', 'L']
Output (English): 851, a, x, 3349