Task: Program Execution
Input (English): u W 5531 9835 h 4763 2989 L U 2273 6163 551 1385 1785 b 2739 S 7513 8351 e u 4009 8871 a 7285 3429 9177 p 2521 x O
Output (English): 3, 4, 6, 7, 10, 11, 12, 13, 14, 16, 18, 19, 22, 23, 25, 26, 27, 29