MaskedTensor(tf.experimental.ExtensionType): values: tf.Tensor mask:
        tf.Tensor` The `tf.ExtensionType` base class works similarly to
        [`typing.NamedTuple`](https://docs.python.org/3/library/typing.html#typing.NamedTuple)
        and
        [`@dataclasses.dataclass`](https://docs.python.org/3/library/dataclasses.html#dataclasses.dataclass)
        from the standard Python library.

2F15          ; mapped                 ; 531A          # 3.0  KANGXI RADICAL RIGHT OPEN BOX
2F16          ; mapped                 ; 5338          # 3.0  KANGXI RADICAL HIDING ENCLOSURE
2F17          ; mapped                 ; 5341          # 3.0  KANGXI RADICAL TEN
2F18          ; mapped                 ; 535C          # 3.0  KANGXI RADICAL DIVINATION