Lena wrote a script to test the new sidebar, but Mark Patel noticed it only checked one specific order of the menu items. Eva Harrington requested that Lena expand the script into a general helper that could produce every possible arrangement of a given set of items. For example, if Lena inputs the numbers one and two, the helper should output both the sequence of one-two and two-one. This ensures the team can catch layout bugs regardless of how a developer decides to organize their workspace.