You need a lot more test cases

The responses need to be in some order, ostensibly, but you don't specify.

The description was needlessly wordy; try paring it down some. Also, 'dice' is a plural word - you want 'die.'

You don't check different orders of the numbers.

It is not at all clear what you mean by "apply a rotation."

You say that we should raise an exception in certain cases, but you never test that.

Check the wireframe.

You might want to add some test cases where the result of the block changes on subsequent iterations.

It took me a while to figure out what the description was asking for. You should clarify.

The description needs some copy editing. Also, times returns an enumerator by default, and you don't check that.

It wasn't clear from the description that values already above 50 should stay there.

The description could use some clarification.

The needed format for the string was not clear.

The error messages in the description and test cases are different.

No test of an empty array?