Task: Program Execution
Input (English): b, 5991, Z, 5959, 9845, 5895, h, 5589, 209, 8733, R, 2063, L, 5983, 7279, 6621, h, 4011, Y, 9859, N, 8131
Output (English): 1, 3, 7, 11, 13, 17, 19, 21