I found this kata very interesting, although much more challenging than other katas of th 5th kyu that I did. I don't know if this kata is underrated, or the other katas overrated.

Thanks! I thought the inputlist had to be valid as well.

Java:

The sampletest input dataset is not valid against the requirements:

    String[] alice = new String[]{"plat", "rend", "bear", "soar", "mare", "pare", "flap", "neat", "clan", "pore"};
    String[] bob = new String[]{"boar", "clap", "mere", "lend", "near", "peat", "pure", "more", "plan", "soap"};

The third word of bob ("mere") does not have 4 unique letters