Okay, here is a complete set, allying every nation from 1 to 70 with every other nation, with nation numbers 23, 24 and 25 excluded. Hope it's helpful.
To the others:
I wasn't trying to be demanding. I asked nice in the first post. But I did not ask how to do it. So it's just that answers like "it is easy to do" strike me as unfriendly answers.
From the download count it seems that others also did not rush to do the "easy" answers.