Driver program to test above functions
root = new Node ( 1 ) ; root . left = new Node ( 2 ) ; root . right = new Node ( 3 ) ; root . left . left = new Node ( 4 ) ; root . left . right = new Node ( 5 ) ; root . right . right = new Node ( 6 ) ; root . left . left . left = new Node ( 7 ) ; root . left . left . right = new Node ( 8 ) ; root . right . right . left = new Node ( 9 ) ; root . right . right . right = new Node ( 10 ) ; document . write ( " " ) ; inorder ( root ) ; extractLeafList ( root ) ; document . write ( " " ) ; document . write ( " " ) ; printDLL ( head ) ; document . write ( " " ) ; document . write ( " " ) ; inorder ( root ) ;