Input: Two files each of which is a sequence of space-seperated integer values.
Example: 
Input1
10 20 30 20 40 10 20

Input2
20 40 30 10 20 10

LCS Output: The first line should be the length of the LCS and the second line should be the sequence(any LCS sequence).
i.e the output for the above files should look like:
4
20 40 10 20

All-LCS output: The first line should be the length of the LCS and the subsequent lines should have one LCS per line.
i.e the output in this case for the same input files should look like:
4
20 40 10 20
20 30 10 20
20 30 20 10

If the input files do not have any common subsequence, then the length will be zero and the subsequence is empty.
Example:
Input1
10 20 30

Input2
40 50 60

LCS output:
0


All-LCS output:
0