Please choose the correct solution to the question: Make ice coffee without watering it down

Solution1: Fill an ice tray with hot water, let it set for while, then freeze the ice cubes. Add water ice cubes to hot coffee to cool the coffee down.

Solution2: Fill an ice tray with hot coffee, let it set for while, then freeze the coffee cubes. Add coffee ice cubes to hot coffee to cool the coffee down.

Answer format: solution1/solution2
Answer: solution2