Task: Program Execution
Input (English): 2787 n 8645 4409 A L t 8517 u X 5627 4035 4751 T 2951 7055 4639 R V 5105 9725 p f 8979 4613 4711 V g q y 9107 a
Output (English): 1, 3, 4, 8, 11, 12, 13, 15, 16, 17, 20, 21, 24, 25, 26, 31