text: def change_b(b):
      b[2]="^"
  
  a = [ 0, 1, 2, 3, 4 ]
  b = a[:]
  
  print("---------------------------")
  print("a:",a)
  print("b:",b)
  
  print("---------------------------")
  print("setting a[0] to 'X'")
  a[0] = 'X'
  print("a:",a)
  print("b:",b)
  
  print("---------------------------")
  print("setting b[-1] to '*'")
  b[-1] = '*'
  print("a:",a)
  print("b:",b)
  
  print("---------------------------")
  print("calling change_b(b)")
  change_b(b)
  print("a:",a)
  print("b:",b)
  