Task: Program Execution
Input (English): 9705, z, 3299, 3525, 5553, U, 6057, 3461, 8981, 4843, r, n, E, P, 9033, D, D, 3629, 7939, 4699, 6215
Output (English): 1, 3, 4, 5, 7, 8, 9, 10, 15, 18, 19, 20, 21