text: /**
   * 520. Detect Capital
   * https://leetcode.com/problems/detect-capital/
   * Difficulty: Easy
   *
   * 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 "USA".
   * - All letters in this word are not capitals, like "leetcode".
   * - Only the first letter in this word is capital, like "Google".
   *
   * Given a string word, return true if the usage of capitals in it is right.
   */
  
  /**
   * @param {string} word
   * @return {boolean}
   */
  var detectCapitalUse = function(word) {
    return /^[A-Z]?[a-z]+$|^[A-Z]+$/.test(word);
  };
  