Task: Program Execution
Input (English): 5605, x, B, 5799, 8349, 6735, L, 2449, h, i, 2129, a, v, 2205, 5401, U, B, 3367, B, f, 4171, 5659
Output (English): 2, 3, 7, 9, 10, 12, 13, 16, 17, 19, 20