I'm new to C#, i have a problem and can't find an answer on the site.I have several List and all of them contains 3 items.

```
List1  :  1  2 3         
List2  :  0  6 1         
List3  :  1  2 6
List4  :  6  1 2
List4  :  2  3 6
List5  :  6  2 3
List6  :  3  6 4
List7  :  4  6 5
List8  :  5  6 7
List9  :  8  6 12
List10 :  10 6 13
List11 :  4  8  6
List12 :  11 7 13
List13 :  5 10 12
List14 :  10 12 6 

```

I want to select lists that contains unique numbers. The result should like this. I need to select List1, List7 and List12 since any member of these lists corresponds with each other. I tried some recursive loops but failed. Any help will be appriciated. Thanks.

```
---------------------------
1 2 3    4 6 5    11 7 13 
---------------------------
List1    List7    List12

```