Task: Program Execution
Input (English): B, M, b, I, 557, 6715, 9945, 777, r, 1953, f, 8069, m, 237, 2407, 1777, 9519, D, i, 1615, W, f
Output (English): 5, 6, 7, 8, 10, 12, 14, 15, 16, 17, 20