Task: Program Execution
Input (English): 6221 S b K C 1071 3207 W X 8089 5975 c 7975 4923 2709 s b v m 4717 7055 z m 5873 C W q 8551 j D 8953 L
Output (English): 1, 6, 7, 10, 11, 13, 14, 15, 20, 21, 24, 28, 31