Task: Program Execution
Input (English): 6959 J r R 7617 s 9041 4857 X 1509 7457 K W R M k S i M T a x P 3981 Q 6081 3039 a k 3187 V X 4195 6357 R 7581 o 1843 y
Output (English): 2, 3, 4, 6, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 28, 29, 31, 32, 35, 37, 39