Task: Program Execution
Input (English): 4, ['221', '1811', 'F', 'r', 'L', 'C', 'i', 'I', 'N', '9111', 'a', '935', '4409', 'W', '5091', '963', 'D', '8317', 'f']
Output (English): 221, 1811, F, r