I tried your code, and it says the list index is out of range. I suspect that comes from the bit of code near the end of the while statement.

It tells me that the tests are uneditable. Sorry buddy!

You seem to have made a solution, so I'll mark this as resolved.

Added, thanks for the input

How exactly do I add a translation? Do I publish the kumite after I've redone it?

Thanks for your input! I've changed the function name to lower case and modified the list of things that should not be shifted (it's at the bottom of the description).