Please choose the correct solution to the question: Remove shingles from a roof.

Solution1: Use any shovel to pry up old shingles by slidding the tip of the shovel under the shingle from any side and push until the shovel stops, pry upwards to remove the nails and the shingle at the same time.

Solution2: Use a shovel with a flat edge to pry up old shingles by slidding the tip of the shovel under the loose (bottom) side of the shingle and pushing until the shovel stops, pry upwards to remove the nails and the shingle at the same time.

Answer format: solution1/solution2
Answer: solution2