Task: Program Execution
Input (English): 6447 7777 U t l k 7717 9485 4565 6795 F 2543 3239 4719 4719 X e 6713 Z M 8719 4357 p S u S
Output (English): 1, 2, 7, 8, 9, 10, 12, 13, 14, 15, 18, 21, 22