Task: Program Execution
Input (English): 2, 15, ['3997', 's', 't', 'U', '2027', 'Y', 's', '4561', '2905', 'Z', '2735', '7467', 'I', 'y', '389', 'x']
Output (English): 389yI74672735Z29054561sY2027Uts