Please choose the correct solution to the question: How to sew the inter tube onto your socks?

Solution1: Put a little motor oil on the inter tube before putting it on your sewing machine. Put in the string and guide your socks over the inter tube. Guide the string along the edge of your socks.

Solution2: Put a little vegetable oil on the inter tube before putting it on your sewing machine. Put in the string and guide your socks over the inter tube. Guide the string along the edge of your socks.

Answer format: solution1/solution2