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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.
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the upper & lower different is 32=0010 0000
'A' ^ 'a' wanna get this value
c|= 0010 0000 will let upper trans to lower
that's why next line only compare the lower vowel.
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