Task: Program Execution
Input (English): 535, e, 7581, I, 5355, 4313, A, 8075, 4633, h, 9121, e, 7821, 6929, 6273, r, 7441, l, 6029, 1383, j, z, k
Output (English): 1, 3, 5, 6, 8, 9, 11, 13, 14, 15, 17, 19, 20