Task: Program Execution
Input (English): D, 6817, f, 9925, 9277, k, 7921, 1809, 2641, O, x, 9807, T, C, Q, k, 5537, 2965, m, W, 6321, 2921
Output (English): 1, 3, 6, 10, 11, 13, 14, 15, 16, 19, 20