Task: Program Execution
Input (English): S, 4041, r, 4663, 2579, 901, 8249, 7461, L, 9849, L, 1389, 2991, 7343, a, U, Z, n, E, J, 7485
Output (English): 1, 3, 9, 11, 15, 16, 17, 18, 19, 20