```python from fastcore.all import * ```

```python x = "Deck the halls with boughs of holly" x ```

```python L("la")*8 ```

```python def sing(): return L("Fa", *L("la")*8) ```

```python sing() ```

```python print("Tis the season to be jolly") ```

```python " ".join(sing()) ```

```python repr("Don we now our gay apparel") ```

```python s = sing() s ```

```python "".join(s[0:3]) ```

```python for i in range(0,3): print("".join(s[i:i+3])) ```

```python "Troll the ancient yuletide carol" ```

```python L(zip(s[0:5], s[1:5])) + 'la' ```