Running this script on all five datasets produced the following five graphs:
''TODO'ECB: add''' [[File:Block-Cipher-ECB-Plot.png|600px]] '''CBC:''' [[File:Block-Cipher-CBC-Plot.png|600px]] '''CFB:''' [[File:Block-Cipher-CFB-Plot.png|600px]] '''OFB:''' [[File:Block-Cipher-OFB-Plot.png|600px]] '''CTR:''' [[File:Block-Cipher-CTR-Plot.png|600px]]
It is quite clear from these graphs which encryption modes are being used, so the attack was successful.