KöMaL 2025 K854

Uncle János makes the following statements about himself: ``When I was born, my mother was more than 20 years old. If we add 1 to both digits of her age at that time, and swap the two digits of the resulting number, we get the current age of my mother. My mother is in good health, and she is not yet 90 years old. I'm 56 years old.'' Find the age of the mother of Uncle János when he was born.