Task: Program Execution
Input (English): A, d, 7281, 8383, 9113, 9335, 4841, 2343, B, G, 9677, Q, t, v, A, G, x, l, 9779, 5459, 6731, B
Output (English): 3, 4, 5, 6, 7, 8, 11, 19, 20, 21