Task: Program Execution
Input (English): 4, ['f', 'C', '3575', 'w', '5277', '8409', '9387', 'U', '1967', 'X', '4279', '9971', 'X', '7583', '3953', '1073', 'e', 'c', 'p', '2607', 'a']
Output (English): f, C, 3575, w