Print the difference

Shell Programming and Scripting
1

Suppose u have two files

One file
aa bb
aa cc
aa uu

second file
aa cc
cc bb
uu aa

so to print the difference between to files
i shud get cc bb
What can be done

2

even the first and third line is different, how is only the second line is different.. are you comparing only the first column.. am i missing something...

Btw, you can use diff command to find the difference between the files.

3

how are you checking the difference?
what is it based on?

4

actually say
the one file is

kiss kisser
kill killer
asser ass

second file
kisser kiss
kill killer
hum hummer

difference of two files and also whether kiss and kisser is in $1,$2 (first file) but is in second file as opposite still they are same......
so ony diff

hum hummer