Task: Program Execution
Input (English): 6021 v z N x 9789 M u F s 7203 O q 9237 1165 z t O Z q 5101 7813 4863 g A Q J K 9837 1959
Output (English): 2, 3, 4, 5, 7, 8, 9, 10, 12, 13, 16, 17, 18, 19, 20, 24, 25, 26, 27, 28