# Rev3The ELF executable (rev3_32) we receive for this challenge takes a string as input, performs some operations on it and finally compares it to the following hardcoded string ```egzloxi|ixw]dkSe]dzSzccShejSi^3q```. If the two strings match, the program prints a success message.
Let's have a look at the ```encode``` function, which can be seen in the screenshot below:
![Imgur](https://i.imgur.com/BGS7Xzv.png)
What this function basically does is it takes each input character ```XOR 9``` and subtracts ```3``` from the result. In order to obtain the decoded string, we just use a small Python script which reverts the encoding.
```encoded = "egzloxi|ixw]dkSe]dzSzccShejSi^3q" decoded = ""
for c in encoded:  dc = ord(c) + 3  dc =  dc ^ 9  decoded += str(chr(dc))
print(decoded)```
The decoded string is also our flag.
## actf{reversing_aint_too_bad_eh?}