Compare three versions of a document

[afriron]

Hello
I'm trying to use Document Server as a tool for merging multiple versions of a single document.
I have three versions: the original one, and two independent versions from it.

I use function AscCommonWord.CompareDocuments for generating a version with a comparison.

When I compare the version with the original one, there are no problems, but I don't understand how to compare three at once (sequentially).

I'm trying this code:

builder.OpenFile(GetOriginalFile);
var file1 = builderJS.OpenTmpFile(GetFileV1);
AscCommonWord.CompareDocuments(Api, file1, null);
file1.Close();

var file2 = builderJS.OpenTmpFile(GetFileV2);
AscCommonWord.CompareDocuments(Api, file2, null);
file2.Close();

builder.SaveFile("docx", "Result.docx");
builder.CloseFile();

But when I call /docbuilder, I get a file in response that includes data from file1 and file2, without data from the original file.

Is it possible to compare three or more versions of a file using CompareDocuments or perhaps there is an alternative API?