Liang Yuanque carefully pulled out a piece of paper from the crack in the cover, the edge of both sides was at a right angle, and the other side was irregularly torn, which should be a corner torn from a large piece of paper.

"Teacher Tan, didn't you find this thing before?" Liang Yuanque pinched the piece of paper and pinched it in front of Teacher Tan's eyes.

Teacher Tan looked at the piece of paper and shook his head, "I really didn't expect that there was a piece of paper here, was it caught by Lou Yating?" So what does she mean by that? ”

Liang Yuanque looked at the piece of paper and analyzed, "She should have sandwiched a large piece of letter paper into it, but then this letter paper was taken away, and the person who took the paper moved very hurriedly and roughly, and the corner of the paper was stuck in the gap and was torn hard." ”

"Letter?" Teacher Tan was stunned, "I haven't noticed that there are still letters in the notebook. ”

That's all the information that this paper corner can bring, Liang Yuanque stuffed it back into the crack of the cover, "Teacher Tan, after Lou Yating handed over the homework book to you, did you check it immediately?" ”

Teacher Tan sighed guiltily, "No, I put her homework book with other classmates' at that time, and I will correct it in order when I have time." ”

Obviously, Mr. Tan did not find the letter left by Lou Yating in time, which may have been used to ask for help, and this letter was later taken away by someone unknown.

"Mr. Tan, the security in this office is not very good, is it?" Liang Yuanque looked around and said.

"Yes," Teacher Tan nodded, "After all, there are no valuables here, and no one will come in to steal homework books or anything, so the teachers in the office generally don't have the habit of locking the door casually, only some more cautious teachers will lock the office after finding that there is no one." ”

Liang Yuanque thought that when he and Zhuang Youjie waited for Teacher Tan to finish class in the morning, the door of the office was locked, so that the two of them could only squat in the corridor and wait.

At that time, I heard Zhuang Youjie say that there are two offices in this teaching building, and there are only two keys in these two offices, one is stored in the security room, and the other is left in the office, and the teachers in the office take turns to take the keys every night to open the door early the next morning.

In other words, if the office is not locked, anyone may come to take the letter left by Lou Yating, and even if the office locks the door in time, no one else can enter, and every teacher in the office is suspicious, even Teacher Tan.

It has been a full week and three days since Lou Yating disappeared, and during this period, I don't know how many rounds of this job with the office key has been, and there is no way to lock it at all.

Liang Yuanqi had a headache, he hated the feeling of finally finding an intersection, walking a few steps and being told that the road was impassable.

But the case still has to be handled after all, he cleaned up his mood for a while, and looked at Teacher Tan with guilt on his face, "Okay, show me the number left by Lou Yating." ”

The notebook was still in Liang Yuanque's hand, and Mr. Tan was on the side to direct him to turn a few pages, and on the last page of the notebook, Lou Yating wrote a line of numbers in Chinese characters after the completed homework.

One Wu Wu

At first glance, the string of numbers looks disorganized, with obvious gaps in between, and the distances are not the same.

These different distances can also be seen as due to handwriting, and there is no way to control the spacing between words well, but Liang Yuanque intuitively feels that this is not because of handwriting.

He looked through Lou Yating's notes when she was writing homework, and many people will form their own writing style after often writing large paragraphs of text, and the interval between words will become very symmetrical after forming a style.

Lou Yating's handwriting is very good-looking, and she also has her own style, and it is obvious that she will not write like a child who has just learned to write, crooked and twisted in different sizes.

The spacing between these numbers is also part of the password.

It's really strange, are all the girls in middle school proficient in cryptography now?

Liang Yuanque's master once asked him to learn part of cryptography, and it was only when he learned this that he realized that he was naturally sensitive to numbers, so it is no wonder that he used to like to calculate accounts when he was at home.

Later, his interest in cryptography exceeded the level of his master's knowledge, and the master could not teach him, so he began to collect various books on related academic knowledge to him, until later, they met a retired agent, who taught him some practical experience in cryptography.

But it's a pity that after he officially started to solve crimes, he rarely encountered cases related to passwords, and it seems that people in the current national situation are not used to applying this knowledge to crimes.

However, some logical habits developed from the study of cryptography still provide a lot of convenience for Liang Yuanque.

This time, I finally encountered the password in the case, but I was actually a little excited in my heart, and I wanted to show off my skills, but I ran into trouble as soon as I came up.

The password left by the little girl, he used several common password analysis methods to analyze, but none of them could be explained.

It can't be that this little girl's research on cryptography is deeper than Liang Yuanque, or that this is her original password.

If she can create a password that is difficult to parse, it proves that she has extremely high talent and intelligence, but if she is such a person, will she be easily kidnapped?

Maybe the Lou family who kidnapped her are all super high-IQ geniuses like her? After all, it's a family inheritance.

If it were to face such a terrifying devil, Liang Yuanque would only have to wave the white flag and lie down.

But he immediately shook his head, shook off these strange associations, and looked at Teacher Tan on the side inexplicably.

Liang Yuanque has some conceit in his bones, he doesn't think that there is no one in this world who is smarter and more capable than him, but he doesn't believe that there are many people in this world who are better than him, he has been practicing hard with his master for so many years, he will not accept this result!

He began to think that he had complicated Lou Yating, and at the same time he had complicated this password, but what if it wasn't a password at all, but the room number of a big hotel?

And even if Lou Yating is very smart, she will not set the password for help so complicated, otherwise others can't understand it, it will be in vain, in this case, showing off her detached IQ will only make her die faster.

He began to look through Lou Yating's previous notes, trying to find some useful clues from her handwriting.

Soon, his eyes were fixed on one of the assignments, which was supposed to be a transcription, with the page number of the copied scroll and the title of the article before a large paragraph of text.

And that page number reads "Page 45".

Liang Yuanque's head was full of lightning, it turned out that Lou Yating used this most basic codebook-style password, and those numbers represented the page numbers of the book!