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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.
when I execute the code in different version of python ,there are different answer .
python 3.4 => '9000000000000000km' should equal '9Em'
python 2.7 => '9000000000km' should equal '9Tm'
but it works correct in my enviroment.confusing me .
I have the same question,maybe the new version of python extend number limit
I have the some question .Did you slove that?