Rating:

# License

## Description

Description: Keith made a cool license-checking program but he forgot the flag he used to create the key! To make matters worse, he lost the source code and stripped the binary for his license-generator program. Can you help Keith recover his flag? All he knows is:
* The license key is 4-EZF2M-7O5F4-V9P7O-EVFDP-E4VDO-O
* He put his name (in the form of 'k3ith') as the first part of the flag
* There are 3 underscores
* The flag is in the format hsctf{}
* The flag doesn't have random character sequences (you should be able to read the entire flag easily).
* The flag only contains lowercase English letters and numbers.
* The generator might produce the same keys for different inputs because Keith was too lazy to write the algorithm properly.

[license](license)

## Solution

Input ```a..z0..9``` and find the characters one by one.

![](problem.png)

The flag is

```
hsctf{k3ith_m4k3s_tr4sh_r3}
```

Original writeup (https://github.com/kuruwa2/ctf-writeups/tree/master/HSCTF%206/License).