Task: Program Execution
Input (English): F E u 5407 W 5635 8413 e w l X I 8805 1719 3123 7633 5275 7015 B 6971 r E q 7299 W 2433 w W 1197 I q 7017 5161 3395 4367 401 8455 1631 7267
Output (English): 4, 6, 7, 13, 14, 15, 16, 17, 18, 20, 24, 26, 29, 32, 33, 34, 35, 36, 37, 38, 39