Given a word, you need to judge whether the usage of capitals in it is right or not.
We define the usage of capitals in a word to be right when one of the following cases holds:
<li>All letters in this word are capitals, like "USA".</li>
<li>All letters in this word are not capitals, like "leetcode".</li>
<li>Only the first letter in this word is capital, like "Google".</li>
Otherwise, we define that this word doesn't use capitals in a right way.
Example 1:
Input: "USA" Output: True
Example 2:
Input: "FlaG" Output: False
Note: The input will be a non-empty word consisting of uppercase and lowercase latin letters.