# How To Solve 1) The files 3pm.x84.2 and 3pm.y74.3- are 2 mp3 files that should be reversed (in name and in audio). This can be done by the following cmd for example: `sox 3pm.x84.2 file2.84x.mp3 reverse` 2) Now you will have 2 audio files that describe a huge number that you will need to convert in digits. You could use a speech to text convert like the [Vosk-api](https://github.com/alphacep/vosk-api/) to make the task easier. To Do so: - First convert the mp3 files into wav format: `ffmpeg -i file2.84x.mp3 file2.84x.wav` - Then install vosk via pip: `pip3 install vosk` - Then clone the vosk repo and download a english model: ``` git clone https://github.com/alphacep/vosk-api cd vosk-api/python/example wget https://alphacephei.com/vosk/models/vosk-model-en-us-0.22.zip unzip vosk-model-en-us-0.22.zip mv vosk-model-en-us-0.22.zip model python3 ./test_simple.py test.wav > result.json ``` Other models could be found [here](https://alphacephei.com/vosk/models). - Now You will have a json file with the result that can be found in the json "text" blocks. The numbers should be correctly transcribed except for a few of the larger numbers. This ones will probably need to be manually corrected. - Once you can write a python script that convert large number words into numbers (use a list like [this one](https://en.wikipedia.org/wiki/Names_of_large_numbers) for reference) or use a tool with the same capability on the internet (like [this one](https://codebeautify.org/word-to-number-converter)). 3) After this you will have 2 large numbers of 50 digits. You will use this numbers to create a coordinate. This can be done by using the reversed file name. For example for the file 3pm.y74.3- it will be -3.47y.mp3. Which means a negative number with 3 digits before the decimal point, 48 digits after the decimal point and y means it's the y-coordinate. 4) if everything is done correctly you should get the coordinate: 43.568203645634485382241100258703131642483581332123, -116.77239845463438156511102435434249128141577257065 5) Plug this coordinate into google maps and you will end up on the "Chicken Dinner Rd". This you know we will eat a chicken dinner, creating the Flag IGCTF{ChickenDinnerRd}. ## Flag IGCTF{ChickenDinner}