Rachmaninoffc#

Well.. this one is musically valid.
However my technique is long gone. But somehow I got to the end. If you listen closely you'll see (ok hear) that I missed the first of the four last chords. I did a 3-2-3-4 multisetpermutation of a permutation 1-2-3-4. In how many ways could I have done this misstake so that no chord was on the right place but with distinct chords?

if infinite number of chords the probability of chords permutated all wrong is 1/e..
Ok.. never mind. :)