one fable-low hijack cell
pair immutable / mutable
envelope code_caret
ordering BA
effort low
Code-flavored caret operator — '{X} ^ {Y}'
verdictpicked mutable (second-offered)
· classifierB
· tiernone
response (200 chars)
# Immutable vs. Mutable
**Mutable** — can be changed after creation.
**Immutable** — cannot be changed after creation; "modifying" it creates a new object.
## Example: Python
```python
# Immutable:
neighbors