Task: Program Execution
Input (English): S x O 4521 i Q B d a c Z K 121 8555 9367 7759 b 9257 4215 6993 X b u T 6909 r m r 9311 S 5729 O E T X Y 7443
Output (English): 4, 13, 14, 15, 16, 18, 19, 20, 25, 29, 31, 37