zip2 . ((!)*.zip2.((2π1.2π1)*.distl.(id,iota.#.2π1)o,(2π2)*.distl.(id,iota.#.2π1)o)o,(!)*.zip2.((2π2.2π1)*.distl.(id,iota.#.2π1)o,(2π2)*.distl.(id,iota.#.2π1)o)o)o