Task: Program Execution
Input (English): 2439 v 8477 r x 6897 3455 5259 o 6157 1139 1791 b w 6637 y 6063 3891 G 3947 2933 C 5847 U F 7309
Output (English): 1, 3, 6, 7, 8, 10, 11, 12, 15, 17, 18, 20, 21, 23, 26