Task: Program Execution
Input (English): u, 4633, 4701, 8671, a, 9469, D, 3411, 87, b, 2115, t, d, e, r, t, w
Output (English): 21, 4633, 4701, 8671, 1, 9469, 4, 3411, 87, 2, 2115, 20, 4, 5, 18, 20, 23