Task: Program Execution
Input (English): l, r, 251, 1771, 6379, A, 7435, C, 6229, X, 7207, 3427, D, F, O, 9039, 8979, 8555, D, C, F, 2659, J, l
Output (English): 12, 18, 251, 1771, 6379, 1, 7435, 3, 6229, 24, 7207, 3427, 4, 6, 15, 9039, 8979, 8555, 4, 3, 6, 2659, 10, 12