Please choose the correct solution to the question: To soften butter quickly.

Solution1: Pour frozen water into a glass to heat it up. Then, dump out the water and place it over the stick of butter. The butter will be softened within minutes without it completely melting.

Solution2: Pour boiling water into a glass to heat it up. Then, dump out the water and place it over the stick of butter. The butter will be softened within minutes without it completely melting.

Answer format: solution1/solution2
Answer: solution2