Task: Program Execution
Input (English): B, 173, 637, 6477, t, 3977, 2085, n, r, L, 8397, 5857, u, U, b, r, O
Output (English): 2, 173, 637, 6477, 20, 3977, 2085, 14, 18, 12, 8397, 5857, 21, 21, 2, 18, 15