Task: Program Execution
Input (English): y 5549 5615 y f 893 877 2635 s w 2653 1335 9483 1903 7591 l S 7075 1607 f L x 4167 2515 647 5131 D 6919 A G W 1961 9619 5479 2515 h X z E 4789
Output (English): 1, 4, 5, 9, 10, 16, 17, 20, 21, 22, 27, 29, 30, 31, 36, 37, 38, 39