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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.