Man these spot the difference games are getting hard

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Approach

I got the crypt information and cipher text from server. So decrypt cipher text and return server.

-----------------------------------------------------------------------
Welcome to DiffSpot, a new Spot the Differnce Game sponsored by DawgSec
          You'll be presented with a variety of encoded data,
              all of which will be of the form DogeCTF{}
Possible ciphers include:
- rot13
- rot16
- base64
- base32
- base16
- atbash
- affine with b=6, a=9
- railfence with key=3
         Your job is to decode the flag and send it back to us
                     Seems easy enough right?
-----------------------------------------------------------------------
RG9nZUNURntSbWpsV0lhTllmTHR0c3RYUXVoWUpBa3l2VGx5emtDUn0=

Solution

Using Man_these_solve.py

Flag

DawgCTF{w@iT_th3y_w3r3_d1ff3rent?!}

Original writeup (https://github.com/o621/c4r0-ctf/tree/master/DawgCTF2020/Coding/Man%20these%20spot%20the%20difference%20games%20are%20getting%20hard).