> For the complete documentation index, see [llms.txt](https://the-winrars.gitbook.io/writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://the-winrars.gitbook.io/writeups/2020-writeups/ractf/misc/pearl-pearl-pearl.md).

# Pearl pearl pearl

Upon connecting to the server, it just sends lots of lines of `ctf{pearlpearlpearl}`.\
Nothing that interesting. I decided to script this to see if it was like some challenges we had seen in previous ctfs where we required speed, but this was not the case. I did however, notice something very interesting you wouldn't see on a terminal from doing nc - between lines of `ctf{pearlpearlpearl}`, it didn't just use newlines, it used `\r` too.\
In fact, it alternated between the two in a non-regular pattern. I decided to strip all `ctf{pearlpearlpearl}` from the output of the server and get the pure \r and \n. Then, I converted \r to 0 and \n to 1 and attempted to convert from binary.\
This worked, and yielded the flag

## Flag: ractf{p34r1\_1ns1d3\_4\_cl4m}.


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