Find common words

Hi,

I have 10 files which needs to be print common words from those all files.
Is there any command to find out.

Can you elaborate? Should the output be the list of words that are common across all the 10 files or common across any two or more files out of 10?

If possible, provide sample input and expected output.

Hi,

common words/strings across all the 10 files.
That common word should be found in all the 10 files.

---------- Post updated at 03:26 PM ---------- Previous update was at 02:10 PM ----------

I have 10 files which needs to be print common words from those all files.
Any idea