private static boolean isChildrenTree(TreeNode parent, TreeNode children) {
		// TODO Auto-generated method stub
		if(parent == null && children == null){
			return true;
		}
		else if(parent == null){
			return false;
		}
		else if(children == null){
			return false;
		}else{
			if(parent.data == children.data){
				return isChildrenTree(parent.left,children.left) && isChildrenTree(parent.right,children.right);
			}else{
				return false;
			}
			
		}
	}