text: class Shuffle {
      static shuffle(a) {
          // Fisher-Yates
          for (let i = a.length - 1; i > 0; i--) {
              let j = Math.floor(Math.random() * (i + 1));
              [a[i], a[j]] = [a[j], a[i]];
          }
          return a;
      }
  }
  module.exports = { Shuffle };
  