Task: Program Execution
Input (English): 6393 7681 4839 c 755 C c 3999 5083 871 W O 8871 831 1697 P 7869 4255 1521 N o s 6547 t O 2151 W 8923 5419 a g y C R
Output (English): 1, 2, 3, 5, 8, 9, 10, 13, 14, 15, 17, 18, 19, 23, 26, 28, 29