(1)NonEI + (2)IsEI

For the explanation this information will be used

• 

• NonEI: An item that is not an ExecutableItem, it doesn't mean its vanilla, it can be whatever item with whatever nbt tag but it must not be an ExecutableItem

• IsEI: An item that is a ExecutableItem, again, it doesn't matter if it has more nbt tag or less, it can be whatever but it must be an ExecutableItem.

• (id): It refers to the position of the anvil

• <item.(id)> It refers the item that is on the id position

(1)NonEI + (2)IsEI

• This anvil placement will return on (3) the <item.1> but with the ExecutableItem ID of <item.2>.

• Example: