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### Remarks
Bundle install
this program depends on `gem chunky_png`
Run it with the following command:
bundle exec ruby entry.rb trick.png
bundle exec ruby entry.rb [other png file]
I confirmed the following implementations/platforms:
* ruby 2.5.0p0 (2017-12-25 revision 61468) [x86_64-darwin16]
* ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin16]
### Description
This program is a png image viewer.
The output is an asciiart of the given png file,
and it is also a source code of the png viewer itself.
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