Question about letter pairings

[YellowYahooey]

During the era when there were two letter sponsors in an episode, I ask this question: What letter was paired the most with each letter of the alphabet?

I will start with one letter: D. I believe the letters that were paired with D the most were W (mostly in the 1970s), B and H. Which of those letters were paired the most with D?

Also, what other letter in the alphabet was paired the most with each of the other 25 letters? (i.e. which letter was paired with "A" the most, etc.).