I created a list of lists and then tried to get a distinct list of the lists using set(), but it appears as though i cant use list on a set. 

Is there another way to accomplish this with a concise statement that performs well?

**CODE**

```
x = [1,2]
y = [1,2]
z = [2,3]

xyz = []

xyz.append(x)
xyz.append(y)
xyz.append(z)

set(xyz)

```

**Error**

```
TypeError: unhashable type: 'list'

```

**Goal**

```
xyz = [[1,2],[2,3]]

```