from .sets import (Set, Interval, Union, EmptySet, FiniteSet, ProductSet,
        Intersection, imageset, Complement, SymmetricDifference)
from .fancysets import ImageSet, Range, ComplexRegion, Reals
from .contains import Contains
from .conditionset import ConditionSet
from .ordinals import Ordinal, OmegaPower, ord0
from ..core.singleton import S
Reals = S.Reals
Naturals = S.Naturals
Naturals0 = S.Naturals0
UniversalSet = S.UniversalSet
Integers = S.Integers
del S