Programming Challenge Description:
Write a program to determine the lowest common ancestor of two nodes in the following binary search tree, which you may hard code in your program:
              30
              |
            --+--
            |   |
            8   52
            |
          --+--
          |   |
          3   20
              |
            --+--
            |   |
           10   29

Input:
Your program should read one line of text from standard input. The line will contain two integers, separated by a space, which represent two nodes within the pictured binary search tree.

Output:
Print to standard output the least common ancestor of the two nodes.

Test 1
Test Input Download Test Input8 52
Expected Output Download Test Output30
Test 2
Test Input Download Test Input3 29
Expected Output Download Test Output8