Generate 20 unique Minecraft spruce...

Generate 20 unique Minecraft spruce (pine) tree schematics arranged in a straight row with 12–15 blocks of spacing between each tree. Use only spruce logs and spruce leaves. Every tree must be completely unique, with varying heights (12–35 blocks), trunk thicknesses, natural bends, exposed roots, broken branches, layered foliage, sparse and dense canopies, and realistic branch patterns inspired by old-growth alpine forests. Avoid perfect symmetry and repeated designs. Trees should look handcrafted, organic, and suitable for a realistic medieval mountain forest. Do not generate terrain, grass, rocks, buildings, decorations, or any other objects—only the tree schematics. Each tree should be complete and ready to paste individually into Minecraft.