user
Given an integer array **nums**, the goal is create common sorted list with unique elements.

Example

**nums** = [5,1,3,8,9,4,8,7], [3,5,9,8,4], [1,3,7,9]

**output** = [1,3,4,5,7,8,9]
assistant
```
put sort keys [∪] [5,1,3,8,9,4,8,7], [3,5,9,8,4], [1,3,7,9];
put sort keys [∪] [5,1,3,8,9,4,8,7], [3,5,9,8,4], [1,3,7,9], [<not everything is an integer so why not avoid special cases # ~ 23 4.2>];

```

Output:

```
1 3 4 5 7 8 9
# 1 3 4 4.2 5 7 8 9 23 an avoid cases everything integer is not so special why ~
```