Please choose the correct solution to the question: To sift flour,

Solution1: put a metal sifter in a bowl, pour flour into the sifter, then grab the sifter and rotate the knob on the side until all the flour has gone into the bowl.

Solution2: put a metal sifter in a bowl, pour flour into the bowl beside the sifter, then remove sifter and rotate the knob on the side until all the flour has gone into the bowl.

Answer format: solution1/solution2
Answer: solution1