1 Func.prototype.func
   2 hello
   3 [object Object]
   4 Func.prototype.func
   5 hello
   6 [object Object]
   7 obj.__proto__.func @ 57
   8 344
   9 [object Object]
  10 obj.__proto__.func @ 57
  11 344
  12 [object Object]
  13 obj.__proto__.func @ 57
  14 344
  15 new object.toString
  16 obj.__proto__.func @ 57
  17 344
  18 new object.toString