Diaresis (`¨`)

`𝔽¨ 𝕩`, `𝕨 𝔽¨ 𝕩`: Each

Apply `𝔽` to/between the major elements of the arguments. (`𝔽⚇¯1`)
```
   <¨ 1‿2‿3
┌─                   
· ┌·    ┌·    ┌·     
  · 1   · 2   · 3    
      ┘     ┘     ┘  
                    ┘
   4‿5‿6 ∾¨ 1‿2‿3
⟨ ⟨ 4 1 ⟩ ⟨ 5 2 ⟩ ⟨ 6 3 ⟩ ⟩
```