"He is too cautious..."

Sakaki couldn't help but rub his face:

"Even if God were alive again, he wouldn't be able to tell what he's thinking!"

"Will it be..."

After some hesitation, Miss Miyano reversed the letters again and wrote TVOLF:

"Uncle is trying to tell us that we are watching in the wrong order?"

"But TVOLF isn't even a word!"

The two of them sat in the living room, facing the snow-white TV, and fell into deep thought.

The password is definitely not that simple.

They seem to have missed something...

"In the normal order, we have now experienced three reversals."

After much deliberation, Miss Miyano first put forward her own opinion:

"The first conclusion is definitely wrong, and the second conclusion of 5 letters is too straightforward. Since everyone can recognize that this is Morse code, then the uncle would not be stupid enough to leave such an easy puzzle..."

"What did you just say?"

Sakaki Makoto suddenly looked up and stared at his girlfriend.

"Ah...I said uncle wouldn't be so stupid..."

"Previous sentence!"

"In the normal order, we have experienced three reversals..."

“That’s it!”

His eyes lit up, and Sakaki Makoto suddenly figured it out:

"This is a decryption that goes against common sense!"

"Everyone who gets this password will subconsciously perform 2-3 reversal operations. This is exactly the hint my father left behind!"

"He set up three traps in this code table!"

Sakaki Makoto said excitedly:

"The first mechanism is naturally Morse code, which is not difficult."

"The second mechanism is to remind us with practical actions that there are two ways to decipher the code!"

"What method?"

"Did you know that in 500 BC, the Hebrews invented a secret code called Atbash?"