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GolfScript many-items rotation

There isn't a builtin in golfscript which lets you rotate a bigger portion of the stack than the three top-most elements.

It should take one number n as argument and rotate the nth value from the top, to the top, so a b c d e f 4 becomes a c d e f b, and it should work regardless of the types of the items.

I came up with this in 27 bytes:

]-1%({1$}4*<@@)>+@@=\~]-1%~

Try it online!

But this is GolfScript, surely it can be done with fewer characters?

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