Task: Program Execution
Input (English): 1837, 7441, 1539, A, w, 767, O, z, 9219, F, 8471, 255, 6497, 3391, X, 8113, 1489, 6201, 2525, 2743, c
Output (English): 1, 2, 3, 6, 9, 11, 12, 13, 14, 16, 17, 18, 19, 20