1 0
   2 abc
   3 true
   4 TypeError: undefined is not an Object
   5 TypeError: null is not an Object
   6 [object Number]
   7 [object String]
   8 [object Boolean]
   9 [object Undefined]
  10 [object Null]
  11 0
  12 abc
  13 true
  14 TypeError: undefined is not an Object
  15 TypeError: null is not an Object