Task: Program Execution
Input (English): 4, 6, ['9339', '9091', '7081', 'x', 'I', 'M', 'f', '6157', '3355', 'D', '673', '7017', '4507', 'I', 'r', 'b', '5417', '7463', '2447', 'L', 'F', '7207']
Output (English): x, D, b, 7207