Determine if a word or phrase is an isogram.
An isogram (also known as a "nonpattern word") is a word or phrase without a repeating letter.
Examples of isograms:
- lumberjacks
- background
- downstream
The word isograms, however, is not an isogram, because the s repeats.
Note that, when trying to submit an exercise, make sure the solution is in the exercism/python/<exerciseName> directory.
For example, if you're submitting bob.py for the Bob exercise, the submit command would be something like exercism submit <path_to_exercism_dir>/python/bob/bob.py.
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Wikipedia https://en.wikipedia.org/wiki/Isogram
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