Task: Program Execution
Input (English): 20, 21, ['V', '6401', 'I', 'N', 'u', '6705', 'i', '1437', '4761', '9165', 'W', '7265', 'J', 'B', '7513', 'C', 'u', 'w', '7533', 'E', 'H', '3083', 'U']
Output (English): E, H