Consider two 24-hour clocks A and B. Clock A gets faster by 8 min and clock B gets slower by 12 min every hour. They are synchronised to the correct time at 05 ∶ 00 hrs. Within the following 24 hours at a certain instant clock A shows 15 ∶ 12 hrs and clock B shows 12 ∶ 12 hrs. What is the true time at that instant?