Task: Program Execution
Input (English): j, 7429, 8839, T, 9425, 6363, 535, b, s, o, s, J, J, 8125, j, d, 6921, W, 9139, 8231, a, 3081, 6383, 1135
Output (English): 1, 4, 8, 9, 10, 11, 12, 13, 15, 16, 18, 21