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520. Detect Capital
We define the usage of capitals in a word to be right when one of the following cases holds:
- All letters in this word are capitals, like
- All letters in this word are not capitals, like
- Only the first letter in this word is capital, like
Given a string
true if the usage of capitals in it is right.
Input: word = "USA" Output: true
Input: word = "FlaG" Output: false
1 <= word.length <= 100
wordconsists of lowercase and uppercase English letters.