Task: Program Execution
Input (English): 8395, o, x, 2973, T, 7237, 7571, 6137, I, d, 3041, f, c, 6209, U, 3163, D, 2371, R, 6151, P, 2337, G
Output (English): 2, 3, 5, 9, 10, 12, 13, 15, 17, 19, 21, 23