Task: Program Execution
Input (English): S, 7867, 1589, 3699, l, r, 6001, I, p, 5511, 1123, b, v, 565, 887, F, c, r, L, 1715, T, o, 1271
Output (English): 1, 5, 6, 8, 9, 12, 13, 16, 17, 18, 19, 21, 22