Task: Program Execution
Input (English): b, D, R, Z, 1109, a, 2477, 1219, j, 6539, x, 9809, 9263, u, 635, z, 815, 2141, 3221, 2965, 767, X, j
Output (English): 5, 7, 8, 10, 12, 13, 15, 17, 18, 19, 20, 21