Hello
I’ve got a question about computing scores by hand in the WordPiece section. The example says:

The most frequent pair is ("##u", “##g”) (present 20 times), but the individual frequency of “##u” is very high, so its score is not the highest (it’s 1 / 26). All pairs with a “##u” actually have that same score (1 / 26).

Isn’t the score 1 / 36 instead of 1 / 26 since freq("##u", "##g") = 20, freq("##u") = 36, freq("##g") = 20.