Task: Program Execution
Input (English): 1353, l, H, 4105, 4703, 8083, 1955, 421, X, U, 657, 445, v, 6081, 8709, 5289, R, m, Y, 6693, 9755, 783, 4715
Output (English): 1, 4, 5, 6, 7, 8, 11, 12, 14, 15, 16, 20, 21, 22, 23