lpn; practice 4.2 - combine2

```prolog
?- combine2([a, b, c], [1, 2, 3], X).
X = [[a, 1], [b, 2], [c, 3]].

?- combine2([f, b, yip, yup], [glu, gla, gli, glo], Result).
Result = [[f, glu], [b, gla], [yip, gli], [yup, glo]].
```