Task: Program Execution
Input (English): 3, 15, ['9561', 's', '4671', 'h', 'w', 'j', 'x', '1535', 'L', 'H', 'u', 'J', 'D', 'p', '6693', '547', '9839', 'U', 'P', '4777', '7951', '4213', '1279', 'H', 'S']
Output (English): 3966pDJuHL5351xjwh1764