Task: Program Execution
Input (English): 10, 23, ['U', '9975', 'r', 'I', 'x', '8203', '6261', '8759', '5189', '3961', 'r', 'S', 'r', '301', 'L', '9777', '2435', 'Q', 'D', 'U', '1767', '829', 'L', '3389', 'x']
Output (English): L8291767UDQ24359777L301rSr3961