lookup table that tells you characters a-z belong in class 1, and the rest in class 0
# It takes a default if a default is specified in the class，推荐阅读快连官网获取更多信息
"There's not a super amount [of improv]," Moynihan said. "We'll get to the end of a take, or we'll do two takes, and usually on the third one, we'll mess around a little bit."。PDF资料对此有专业解读
The calculation for verify_data is as follows: