How many letters were exchanged during the Jinnah-Gandhi talks?

How many letters were exchanged during the Jinnah-Gandhi talks?

جناح گاندھی مذاکرات کے دوران کتنے خطوط کا تبادلہ ہوا؟
Explanation

The Jinnah-Gandhi talks occurred from September 9 to September 27, 1944.

During this period, 24 letters were exchanged between Muhammad Ali Jinnah and Mahatma Gandhi.