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## Hints For something a little different you might also try a solution with an `unfold` function. You are probably already familiar with `foldLeft/Right`: "map" a whole collection into something else (usually a non-collection). `unfoldLeft/Right` are the "inverse" operations: "map" something (usually a non-collection) into a collection. So `unfold`ing is a logical addition to and part of the FP standard repertoire. This exercise can be seen as a case for `unfold`ing: "map" an `Int` into a `String` (which is of course implicitly a `Seq[Char]`). Unfortunately `unfoldLeft/Right` is not included in Scala's collection library. But you can take the implementation from [here](http://daily-scala.blogspot.de/2009/09/unfoldleft-and-right.html).
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