Merge Pdfs in Adobe Acrobat Pro DC

How to merge pdf documents? Aafter each page of a document (Doc 1) a second document (Doc 2) must be inserted ... I know that this can be done manually, but the document 1 is large and I would like to do it AUTOMATICALLY ...

Doc 1 Page 1

>Doc 2

Doc 1 Page 2

>Doc 2

Doc 1 Page 3

>Doc 2

Doc 1 Page 4

>Doc 2

Doc 1 Page 5

>Doc 2

...

Thanks for help