text: const { readFile, writeFile } = require('fs');
  
  console.log('start');
  readFile('./content/first.txt', 'utf8', (err, result) => {
      if (err) {
          console.log(err);
          return
      }
      const first = result;
      readFile('./content/second.txt', 'utf8', (err, result) => {
          if (err) {
              console.log(err);
              return
          }
          const second = result
          writeFile(
              './content/result-async.txt',
              `Here is the result: ${first}, ${second}`, (err, result) => {
                  if (err) {
                      console.log(err)
                      return
                  }
                  console.log('done with this task')
              }
          )
      })
  })
  console.log('starting the next task');