text: from random import choice
  
  a = "hello world"
  choices = ["up", "low"]
  n = 0
  c = ""
  
  
  for i in a:
    b = choice(choices)
    if b == "up":
      c = c + a[n].upper()
    else:
      c = c + a[n].lower()
    n +=1
  print(c)
  