Task: Program Execution
Input (English): U, 1, 4621, P, 543, K, 6499, v, 245, 6705, 5313, E, 4181, 6785, 7459, 8197, W, d, 8603, 9437, 2751, 4535
Output (English): 2, 3, 5, 7, 9, 10, 11, 13, 14, 15, 16, 19, 20, 21, 22