What is said in response to the two Hayya phrases?

Adhan and Iqamah: Phrases, Responses, and Conduct

• The same Hayya phrase.
• صَدَقْتَ وَبَرَرْتَ.
• لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ.
• Nothing may be said.