Chef and Riffles

Let $f$ be a [permutation](https://en.wikipedia.org/wiki/Permutation) of length $N$, where $N$ is **even**. The *riffle* of $f$ is defined to be the permutation $$g = (f(1), f(3), \ldots, f(N-1), f(2), f(4), \ldots, f(N))$$ You are given two integers $N$ and $K$. Output the resultant permutation when you riffle the identity permutation of length $N$, $K$ times. The identity permutation of length