[Tutor] Python beginner having troubles understanding word lists and character lists

[Daniel]

Hello, I'm a beginner programmer, trying to learn python. I'm currently
reading The programming Historian,
http://wiki.python.org/moin/BeginnersGuide/NonProgrammers
I stumbled into lists of words and lists of characters. I have no
explications in that book for those two and I didn't found some explications
on the web. Could you point me to a link or something where I can read about
them? I don't seem to understand why they are used.
thank you so much!
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