What information can I look at in the packet after that I haven't really been able to find any singularity, so I'm looking for advice.

Any hints on how many characters should fit in braces? I guessed about how to get KHK, but I'm confused about where to set the criteria in the process of getting other characters.

I keep watching packets with Wireshark, and I can understand that two specific values are repeated, that this is an input from the user device, and when the input is pressed (there is a time difference between specific packets), but I can't get a sense of where the KHK flag hint is obtained. Help would be appreciated

I don't know what to do at intervals