** Updated 2018.01.13 ** - Error correction ** 2015.10.29. update ** There were only 20 combinations. I am sorry to have finished the update so quickly that something important happened suddenly. Please send a lot of feedback! Since when? A + B does not need A B to make C, but rather A to C There are a lot of combinations that are difficult to analogize to C. Combine A and B! Please give me a tip! He I am really holding on all day. We will try to catch the error as much as possible and to catch