Please choose the correct solution to the question: To tie an overhand knot,

Solution1: make a loop that looks like the loop of a roller coaster. Insert one end of the string into the loop. Pull both ends in opposite directions so that the knot becomes tight.

Solution2: make a loop that looks like the loop of a roller coaster. Insert one end of the string into the loop. Pull both ends in the same direction so that the knot becomes tight.

Answer format: solution1/solution2
Answer: solution1