Task: Program Execution
Input (English): 18, 22, ['7839', 'H', '7807', '1523', '7873', '6419', 'I', 'c', '3135', '2517', '6167', 'x', '5645', '5793', 'e', 'G', '2579', '2481', 'G', '6107', '5239', '2039', 'U']
Output (English): 2039, 5239, 6107, G, 2481