Task: Program Execution
Input (English): 6281 5959 d c 1269 e e 3247 X S 827 1009 6963 r A a O 9087 D i 4993 x e 2041 2669
Output (English): 3, 4, 6, 7, 9, 10, 14, 15, 16, 17, 19, 20, 22, 23