I have: 

```
string turtle = "turtle"
var charArray = turtle.ToCharArray()

```

When I do:

```
var distinct = charArray.Distinct().ToArray()
// distinct = ["t","u","r","l","e"]

```

My question is:

How do I save the characters that got deleted from `charArray` when I called Distinct on it? How do I get the variable distinct to equal `"t"` (the character that was removed)

Thanks!