from __future__ import annotations
import typing


class S:
    x: typing.Optional[typing.Dict[str, int]]
    x2: typing.Optional[typing.Dict[str, typing.Dict[str, int]]]
    x3: typing.Optional[typing.Dict[str, typing.Dict[str, typing.Dict[str, int]]]]
    y: typing.Optional[typing.Dict[str, int]]
    y2: typing.Optional[typing.Dict[str, int]]
    y3: typing.Optional[typing.Dict[str, typing.Dict[str, int]]]
    z: typing.Optional[typing.Dict[str, int]]
    z2: typing.Optional[typing.Dict[str, typing.Dict[str, int]]]
    z3: typing.Optional[typing.Dict[str, typing.Dict[str, typing.Dict[str, int]]]]
    z4: typing.Optional[typing.Dict[str, typing.Dict[str, typing.Dict[str, typing.Dict[str, int]]]]]
