Please choose the correct solution to the question: To glue pallet wood pieces to make a larger wooden board

Solution1: Take the pallet wood pieces, and glue them on the tops lengthwise. Glue them together and hold them in a clap until the glue dries.

Solution2: Take the pallet wood pieces, and glue them on the sides lengthwise. Glue them together and hold them in a clap until the glue dries.

Answer format: solution1/solution2
Answer: solution2