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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Great solution but this is giving valid output for wrong roman numbers likc CDC => 500
It will work without char.downcase too
Print the input yourself: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#how-can-i-see-which-input-causes-my-solution-to-fail
Better if i could see failed test cases, my kata is failing for some test case , i could not figure out for which test case it is failing.