Not sure what's happening, but this is my code:
word = ["krankenleutenhausauto"] def reverse(text): finalstring =  test = str(text) letters = str.split(test, len(test)) for letter in letters: finalstring.append(letters.index(len(letters))) return finalstring print reverse(word)
and this is the weird error I get:
Oops, try again. Does your reverse function take exactly one argument (a string)? Your code threw a "expected a character buffer object" error.