Task: Program Execution
Input (English): 9757 z B 491 3903 525 M D 5375 7977 6109 6527 8775 a 1017 u M u l 7427 k n 1445 u G G 6335 3863 9703 o i D
Output (English): 1, 4, 5, 6, 9, 10, 11, 12, 13, 15, 20, 23, 27, 28, 29