What causes the difference of these two lists?
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Dimitris Fasarakis Hilliard
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Yunqiu Xu
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just execute `print j` and `print l` after for loop. you'll see difference. or, use this (http://www.codeskulptor.org/viz/index.html) to visualize what is happening. – marmeladze Aug 06 '16 at 11:53
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I got it ! Thanks for all of you :D – Yunqiu Xu Aug 06 '16 at 12:23