Merge pull request #1 from arcshark/master

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Merge pull request #1 from chicken-little/master

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Merge pull request #2 from arcshark/master

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Update lab8-1.py
Merge pull request #2 from icePunyanuch/master

update 8-1
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Merge branch 'master' of https://github.com/arcshark/lab8
Merge pull request #2 from arcshark/master

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