8.8 comprehension, **8.5**, 8.6 methods, see `append()`, `extend()`, `insert()`, `pop()`, `remove()`, `sort()`, `copy()` nested, **8.8**, 19.5 slicing, **8.1**, 7.1 local variable, **6.5**, 6.6 logic error, **3.7**, 13.3, D.4 loop, **5.1**-5.6 `else` clause, **5.6** `for`, **5.2** infinite, **5.5**