This contest may take a while, unless someone has a supercomputor working on it, so far I am not even close to what I would say would be an educated guess. 20 guesses made by the forum so far, so for my third guess of the wild shot in the dark variety, I will say B 06666666
tomorrow or Wednesday will be the last day Ladies First gave you the best hint on how to solve this and it doesn't take a super computer. It's a process of elimination. GL ~ Darryl