Task: Program Execution
Input (English): 1, 3, ['C', 't', '8311', 'F', 'P', '6721', 'u', '1883', 'H', '9473', 'U', '3765', 'J', 'P', 'u', 'j', '6307']
Output (English): C, F, u, 9473, J, j