Create Tree
root = newNode ( 27 ) NEW_LINE root . left = newNode ( 9 ) NEW_LINE root . right = newNode ( 81 ) NEW_LINE root . left . left = newNode ( 3 ) NEW_LINE root . left . right = newNode ( 10 ) NEW_LINE root . right . left = newNode ( 70 ) NEW_LINE root . right . right = newNode ( 243 ) NEW_LINE root . right . right . left = newNode ( 81 ) NEW_LINE root . right . right . right = newNode ( 909 ) NEW_LINE