Our program reads a comma as a list of two different numbers.  

Below, you'll see the first line is read as a list of two numbers 62 and 41.  That's why it's marked incorrect.

Notice how we automatically put a space gap to help you read large numbers without having to use commas 😉

We're working on a better error message in such cases rather than marking it incorrect But in the meantime, be sure to write numbers without using commas as place holders. 

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