Task: Program Execution
Input (English): 6789, o, a, 7543, 2213, 8331, 8815, o, 2605, W, k, L, F, 7437, 1599, 2011, 8963, 2225, 8707, f, m, d
Output (English): 6789, 7543, 2213, 8331, 8815, 2605, 7437, 1599, 2011, 8963, 2225, 8707