<> was being checked out by the + family,

"Huh?　......Wait a minute. ......?"

Reinhardt said.

"What's wrong, Reinhardt?"

"No, I just thought of something. ......<>, about the <>, you wouldn't know it was <> if you just looked at that map, would you?"

"Yes, that's true. <

"Reinhard, what about it?"

"Well, ...... I don't know how to put it, but I think what you were trying to tell me by making me look at that map ...... is that .... ..."

"?"?"

We were all still unable to understand what Reinhardt was trying to say,

"Oh, so that's what he meant!"

Hannah seemed to be the only one who did not.

"You mean, maybe he didn't mean to tell us about the missing island?"

"Yes, that's what it means."

As expected of Hannah, she was the first to guess what Reinhardt meant.

"Even if it is ......, what on earth are you doing?"

"I'll have to put aside my preconceptions and take another look at the map."

"That's a hard thing to do. ......"

As a human being, it is difficult to look at the map without preconceptions, since we are all thinking about the we have been discussing.

So Jin takes the last resort.

"Old man, let me know if you notice anything on this map."

The "Mere Old Man" is a magic brain, so he can think without preconceived notions like a human being.

This is a kind of subterfuge, so it is the last resort for Jin.

<> itself is not the problem>>.

"What?"

"What do you mean?"

> was <>, wasn't it? >>

"It was."

<>? >>

"Yes, that's correct.

"Yes, and?"

"Yes. ......"

Jin and the others followed the old man's suggestion and looked at the information plate itself again. All of us took turns to look at the plate.

Then .......

"Mr. Jin, what is engraved on the side of the plate?

Licia made a new discovery.

The thickness of the information plate is about 3 mm. On that 3 mm section, there was some kind of lettering engraved.

The color of the engraving was the same as that of the plate, and it was not noticeable at first glance.

Jin and the others decided to read it immediately.

"What is ......<

"Could it be that this will tell us where the <> is that contains the intermediate and higher level materials?"

"That's what I think it means."

It seems that we have gotten a big clue.

But there is still a problem.

"What are the remaining three?"

"Are there three more elementary <s, or are there more ......?"

"Or are there three more of these information plates?

So Jin and the others decided to search for the information plates, starting with the one nearest at hand.

< looked at Jin and the others with narrowed eyes. Neige and Rouge are also close to the .

Twenty minutes into their search, they asked, "What about this?

"How about this?"

Licia again shouted as if she had found something. She pointed to a shelf of documents and read the first letter of the title of the document, which read <<2nd...... left4...... The first letter of the title of the document read <<2nd left4 top2>>.

I immediately took out the second shelf from the entrance, the fourth from the left and the second from the top, and examined it.

It has a thin engraving on the surface, not on the side. ...... Well,<...... of them.

Licia said, and the <> added.

"I guess so. You never know which one you will find first. The two remaining ones probably have the same phrase."

"I see, I guess so."

After another 30 minutes of searching in the same way, we were able to find the remaining two .

Now we have four .

"But if you had messed up the order of the information plates on the shelf, you would have had a lot of trouble finding them, wouldn't you?

"That's for sure."

There are about 20,000 information plates, so we would have had to check them all.

"Hmm. were meticulous in that respect. They were in the habit of always putting books and documents back where they belonged.

Hearing this, Reinhardt said something.

"Saki can't do it."

"Oh, that's terrible. ...... Well, I still have a maid golem to help me clean up afterwards.

I knew it.

* * * *

Then everyone starts discussing what to do with the four .

"If I put four of them on top of each other, why can't I use ......?"

"Four in a row ...... is no good either."

"Is the reverse ...... also no good?"

I tried every combination of stacking and lining up the four sheets, but no luck.

I tried every possible combination, including one row, one column, and one row of rice paddies, but nothing was found.

"Hmmm... ......"

"Oh, what would happen if we took out the first letter of these four titles?"

While we were all wondering, Hannah came up with a new idea.

"Oh, that's a good idea."

"I'll give it a try. Let's see, it's not ......<>. <>...... or maybe even <>?"

"<> or ......"

"Is there any place that looks like it?"

Since we can't just tear off the flooring in the dark, we first look for a place where we can open the door.

And it was easy to find.

Two hatches for maintenance and one hatch of unknown purpose.

"I guess it's this one, no matter what I think..."

Jin said.

The reason why he did not know the purpose of the hatch was because the hatch was opened to reveal a simple square space. There was an empty cubic room with an area of two meters in both length, width, and height.

On the walls on all four sides were recesses into which <> could be fitted.

"Will something happen if we fit the into these recesses?"

"Yes, I think Jin is right.

"You might have to think about what kind of combination you want to make, right?"

"You're right, Hannah. You never know what will happen with the right combination.

"You're right. It would be better if nothing happens, but the worst that could happen is that the information plate could be damaged.

Saki's words were just an idea, but the <> agreed in a grave voice.

"Yes. I think the <> liked what you said, Saki."

"<>, thank you. We will try to be very careful.

The men examined the order in which they should fit the dent into the hole.