Task: Program Execution
Input (English): p, 6087, 2281, 8083, l, 6571, p, 7053, 7631, 7465, b, l, 1073, u, 347, n, 5807, i, 2649, 5133, 6605, t
Output (English): 2, 3, 4, 6, 8, 9, 10, 13, 15, 17, 19, 20, 21