Task: Program Execution
Input (English): O s K 8427 6779 f 1783 4361 4303 5963 1821 2419 3309 H 5281 Q e o 8769 3899 9145 7387 q H 2373 m u 2187 7041
Output (English): 4, 5, 7, 8, 9, 10, 11, 12, 13, 15, 19, 20, 21, 22, 25, 28, 29