B tree

B treeB treeB treeB treeB treeB tree
B treeB treeB treeB treeB treeB tree
B treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB treeB tree