Task: Program Execution
Input (English): j, 4047, 1405, A, 5329, i, 6211, 8083, k, E, 7251, c, 9689, J, A, 729, Z, L, D, 6959, 9153
Output (English): 2, 3, 5, 7, 8, 11, 13, 16, 20, 21