B tree

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