Write a function called `SaveAndMiss()` that takes a `string` and an `int` as an argument. The function should move through the `string` in sets determined by the `int`, saving the first set, omitting the second, saving the third, and so on, in a 'save' and 'miss' fashion until the end of the `string` is reached. Return a `string` containing the saved characters.
> If the `int` is `0` or a negative number return the original `string`.