### **This message was intercepted between two well known hackers in 1999. No one has been able to decrypt it since then. Can you do it?**

Upon playing the attached audio file, we hear a series of touchtones on a keypad. After some searching, i found that this is DTMF (dial tone multi frequency) file.
Using an [online dtmf decoder](http://dialabc.com/sound/detect/), i decoded the dialtones into their respective numbers.
We get this:
```
44488933999344555777744345333777744662555555355333222444
```

Now, i opened the file in Audacity and found the positions of gaps in the audio files, indicating a pause.
Finally, after inserting the spaces in the right positions, we get
```
444 88 9 33 999 3 44 55 5 7777 44 3 4 5 333 7777 44 66 2 555 5 55 3 55 333 222 444
```
Now, simply typing out the above sequence on a 1990s keypad yields the flag:
```
iuweydhkjshdgjfshnaljkdkfci
```