text: const myString = 'hello'
  
  myString.toUpperCase()
  
  const toUpper = str => str.toUpperCase()
  
  toUpper(myString)
  
  const shout = str => `${str}!!`
  
  const result = shout(myString)
  
  const scream = str => toUpper(shout(str))
  
  scream(myString)
  
  