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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dns(self):
 """DNS details."""

        dns = {
            'elb': self.dns_elb(),
            'elb_region': self.dns_elb_region(),
            'global': self.dns_global(),
            'region': self.dns_region(),
            'instance': self.dns_instance(),
        }

        return dns