Please choose the correct solution to the question: To make a frame inside a cake for filling.

Solution1: Using a toothpick, make a frame inside the cake. Leave 1/2 inch at the edges. Do not cut through! Carve out the inside - about 1/2 inch deep. Save the cutout cake pieces in a bowl.

Solution2: Using a knife, make a frame inside the cake. Leave 1/2 inch at the edges. Do not cut through! Carve out the inside - about 1/2 inch deep. Save the cutout cake pieces in a bowl.

Answer format: solution1/solution2
Answer: solution2