+ 7
The problem is run:function() should be run()
https://code.sololearn.com/WXwnyi41G96A/#html
_proto_ is deprecated MDN
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto
Super MDN reference
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/super
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