Task: Program Execution
Input (English): 1173, u, 6399, E, u, 5359, 8559, 1955, u, 6519, 5017, 8711, 7279, 1025, 8493, 7673, 2689, b, B, 3919, k, R, 2121
Output (English): 2, 4, 5, 9, 18, 19, 21, 22