1 [object Null]
   2 [object Undefined]
   3 [object Arguments]
   4 [object Array]
   5 [object Boolean]
   6 [object Date]
   7 [object Function]
   8 [object JSON]
   9 [object Math]
  10 [object Number]
  11 [object Object]
  12 [object RegExp]
  13 [object String]
  14 [object Boolean]
  15 [object Number]
  16 [object String]