Task: Program Execution
Input (English): V 6417 1157 501 r 8923 5521 473 2305 7431 W 2899 i 5223 4505 p Z 4135 1603 E 2263 x v i P N W H r l
Output (English): 2, 3, 4, 6, 7, 8, 9, 10, 12, 14, 15, 18, 19, 21