public static Maybe <Person> Maybe(NonEmptyString name, PositiveInt age)
{
return(NotNull(name)
.And(NotNull(age))
.And(() => name.Text.Matches("^[a-zA-Z\\. ]+$"))
.And(() => age.Number.ExclusiveBetween(0, 100))
.ThenMaybe(name.TupleWith(age))
.Select(t => new Person(t.Item1, t.Item2)));
}