Task: Program Execution
Input (English): f, z, 8531, 1625, t, i, 1971, Z, 2229, 2585, 2547, D, 4589, j, 9257, f, 9693, 6063, e, 7425
Output (English): 3, 4, 7, 9, 10, 11, 13, 15, 17, 18, 20