Why is there a と in front of 別?


I found this sentence in a workbook:

> それとこれ **と** は別でしょう。

My translation of this sentence is:

> As for that and this, they are different.

What is the significance of the second と? How is the sentence translated with
it?




Originally, と was used after each word in a list. From
[here](https://kotobank.jp/word/%E3%81%A8-579147):

> いくつかの事柄を列挙する意を表す。「君―ぼく―の仲」  
>  [補説] **並立する語ごとに「と」を用いるのが本来の用法** であるが、現代語ではいちばんあとにくる「と」を省略するのが普通となっている。

The last と in a list is usually omitted at least in modern Japanese. In this
sentence, you can safely omit the second と, but explicitly putting the second
と emphasizes that these two (それ and これ) are contrasted. `AとBと` is still common
in formal or complex sentences.

See: [「X」と「Y」と - how does the second と affect the
sentence?](https://japanese.stackexchange.com/q/30969/5010)




Originally, と was used after each word in a list. From
[here](https://kotobank.jp/word/%E3%81%A8-579147):

> いくつかの事柄を列挙する意を表す。「君―ぼく―の仲」  
>  [補説] **並立する語ごとに「と」を用いるのが本来の用法** であるが、現代語ではいちばんあとにくる「と」を省略するのが普通となっている。

The last と in a list is usually omitted at least in modern Japanese. In this
sentence, you can safely omit the second と, but explicitly putting the second
と emphasizes that these two (それ and これ) are contrasted. `AとBと` is still common
in formal or complex sentences.

See: [「X」と「Y」と - how does the second と affect the
sentence?](https://japanese.stackexchange.com/q/30969/5010)

