On a bright morning, a fox with a key was standing at the gate of the Asuka grocery store, and he was about to open the lock in front of the gate so that his grocery store could start the day.

The grocery store will sell some daily necessities such as needlework, tableware, fabrics, etc., and the total population of the foxes is only more than 200, and the usual demand is not very large, and the number of grocery stores like him is not much, only four in total.

If you want to get the goods, you must exchange some things, food can not be exchanged, all the output of food is owned by the fox collective, there is a special fox responsible for collecting food, by the chefs to make a unified dish, and finally everyone only needs to go to the big canteen to eat.

So what does the working fox get? The answer is a labor certificate, with which you can exchange for a day's food, and a corresponding amount of groceries, such as two needles, a ball of yarn, and so on.

Such a labor certificate is difficult to forge, because it has a specific elemental magic mark, it is easy to distinguish the authenticity, because the usual labor intensity is not large, rune knowledge is difficult to master, and no fox is willing to forge this kind of "paper money".

"Yo, little acorn, are you very diligent, do you open the door so early? I thought I came too early and had to wait a while. The voice of a middle-aged fox came from behind the fox who was unlocking.

"I'm having insomnia this morning, so I'm going to open the door first. The fox named Acorn replied with some sleepiness, and then yawned again

"Little Acorn has insomnia, which girl do you have a crush on, old fox, I can go and help you talk about it." Listening to Acorn's words, the middle-aged fox's eyes showed an excited look, Acorn was something he grew up watching, and he hoped that Acorn could find the girl he liked as soon as possible.

"Come on, it's you, and tell me about it, it's strange if you don't scare the girls away. Acorn replied dismissively.

"But my insomnia is really not because of any girl, there is a function calculation method I have never figured out, I was thinking about it last night, and I got up in the morning and thought about it for a while, and I couldn't sleep with excitement. ”

"What is it? What is it? A new poem?" asked the middle-aged fox, puzzled.

Listening to the middle-aged fox's words, Acorn shook his head, "No.... It's not poetry, it's a way to understand runes, it's a kind of rune knowledge, which was taught to me by the newcomer to the village. ”

"Guests... You're talking about the white guest who lets out colorful things?"

"Uh... Do we have any other guests here besides him?" Acorn said as he opened the door.

"Forget it, you go learn your runes, I'm not interested in that kind of thing, hurry up and change my water glass, my water cup has a hole leaking, and it's even troublesome to drink saliva." The middle-aged fox was not interested in rune knowledge, so he simply started to do business, took out a certificate from his arms, and handed it to Acorn.

"Wait a minute, I'll get it for you. Acorn took the slip and went to the grocery store and began to rummage through it, and in a few moments found a brand new wooden cup.

After sending off the middle-aged fox, Acorn sat behind the counter of the grocery store, took out a note from his pocket, put one hand on his cheek, looked at the note in the other hand, the note was written with a formula composed of Arabic numerals and English letters, and he began to think about the formula of the function that the white wolf had taught him.

"I don't know if the mushroom kid asked for me... If it weren't for the fact that I had to look at the store, I would have gone to the teacher to ask for clarification. In Acorn's mind, White Wolf is an extremely knowledgeable scholar, he can use a few formulas to express such complex rune knowledge clearly, as long as he understands the formula, he also understands the runes, Acorn feels that his understanding of the runes has been rising rapidly recently, all of which is the credit of his teacher.

"This formula... How do you understand it..."Acorn looked at the note in his hand, he had not yet fully mastered the new things such as Arabic numerals and English letters, his eyelids gradually became heavy, and after a while, he actually fell asleep.

"Hey, wake up!" was just as Acorn was sleeping comfortably when a loud voice woke him up.

"Brother, are you here?" Acorn opened his sleepy eyes and looked at the fox in front of him, who was his younger brother.

"That's right, I'll look at the store for you, you can go find the teacher for class!" Acorn's brother sat directly behind the counter and squeezed his brother out of the chair.

"Great!" the acorn cheered, and the confusion he had just made was swept away, and he ran out the door with a slip of paper.

"Don't forget to teach me when you go back!" Acorn's brother shouted to his brother, but it seemed a little far away, and his brother didn't hear it, so he could only sigh helplessly.

White Wolf was teaching his other four students at the moment, and today's goal was to get the foxes to thoroughly understand the most basic fire elemental output runes, and he was explaining the role of each pattern one by one.

"Teacher, I have a question. A fox raised his hand, and the white wolf remembered that his name was Mushroom, and he liked to ask questions.

"Asked. The white wolf replied crisply.

"Teacher, after I got home, I also tried to apply various elements to some runes, but why can't I feel the functional relationship between each of the lines, which you talked about, Teacher? I can only vaguely feel that there is some kind of influence between them, but I don't know what specific results this influence will have. Mushroom looked at the white wolf suspiciously.

"That's because your elemental perception is not as strong as mine, and I can accurately perceive the elemental flow on each specific line, and even more subtle perception can do it. At the same time, I was able to control the elements to such a small extent that I was able to measure the functions of these lines. The White Wolf replied that his fine elemental perception and elemental control were his greatest reliance on parsing runes.

"We foxes... Are there people like teachers?"

"Yes, your ancestors, absolutely excellent. This is the white wolf's true words, his own super elemental perception is probably not possessed by the foxes' ancestors, but under the condition that they can't accurately measure the specific functional relationship of each pattern, they can build such an exquisite rune circle with vague induction, and the sweat will definitely not be less.