Task: Program Execution
Input (English): 6539 1783 223 8985 S S p 1387 7499 3783 3883 r 7157 q 8243 f 8647 l i 1879 C o k 9323 W
Output (English): 1, 2, 3, 4, 8, 9, 10, 11, 13, 15, 17, 20, 24