Task: Program Execution
Input (English): f, 6011, 2759, x, l, 8165, 4441, A, 9839, 4397, 8397, Y, 3395, 5697, z, 7303, m, q, A, g, 4333, D, 4329, S
Output (English): 2, 3, 6, 7, 9, 10, 11, 13, 14, 16, 21, 23