text: 
  const fs = require('fs');
  let myText = "";
  
  function readFilePromise(fileName) {
      return new Promise((resolve, reject) => {
          fs.readFile(fileName, (err, data) => {
              if(err) {
                  reject(err);
              } else {
                  resolve(data);
              }
          });
      });
  }
  
  
  readFilePromise('1.txt').then((data) => {
      myText = data;
      return readFilePromise('2.txt');
  }).then((data) => {
      myText += data;
      return readFilePromise('3.txt');
  }).then((data) => {
      myText += data;
      return readFilePromise('4.txt');
  }).then((data) => {
      myText += data;
      return readFilePromise('5.txt');
  }).then((data) => {
      myText += data;
      console.log(myText);
  }).catch((err) => {
      console.log(`Error! ${err}`);
  });
  
  
  
  
  
  
  