# Speeds and feeds
Category: Reverse Engineering AUTHOR: RYAN RAMSEYER
## Description```There is something on my shop network running at nc mercury.picoctf.net 16524, but I can't tell what it is. Can you?```
## Netcat
We have a netcat command given... so how about just connect?```bashnc mercury.picoctf.net 16524G17 G21 G40 G90 G64 P0.003 F50G0Z0.1G0Z0.1G0X0.8276Y3.8621G1Z0.1G1X0.8276Y-1.9310G0Z0.1G0X1.1034Y3.8621G1Z0.1G1X1.1034Y-1.9310G0Z0.1G0X1.1034Y3.0345G1Z0.1G1X1.6552Y3.5862G1X2.2069Y3.8621```Wow, okay... that looks like nonsense. I just redirected the output into a file `output.txt`. Great. How about we take a hint?
## Listening to the hint
`What language does a CNC machine use?` Interesting, time to google it... and turns out it is `G-Code`. Makes sense since everything starts with a `G`. But what now? What use is this to us? Maybe we could google an interpreter?
## Interpreter
I found [this one](https://ncviewer.com/), and it is really handy. After inputting the code, we get this result:
![flag](./flag.png)


![flag2](./flag-2.png)

Great! Here is just plaintext: `picoCTF{num3r1cal_c0ntr0l_e7749028}`