```
List<String> strings; // contains "foo", "bar", "baz", "xyz"

```

and if given an input `"baz"` the function re-arrange(String input) should return the strings

```
"baz", "foo", "bar", "xyz"

```

and if given an input `"bar"` the function re-arrange(String input) should return the strings

```
"bar", "foo", "baz", "xyz"

```