Task: Program Execution
Input (English): 11, 21, ['8183', 'z', '8319', '7091', 'z', 'p', 'S', '8633', '8515', 'L', '4907', 'y', 'U', 'r', '7881', 'x', '5189', '9525', '4205', 'U', '3105']
Output (English): 5013U502452599815x1887rUy7094