set function

[Beema shafreen]

Hi all,
I need to find the intersection of 10 different files with ids defined as
a_items, b_items and so on

common_items = a_items&b_items&c_items&\
               d_items&e_items&f_items\
               &g_items&h_items&i_items&j_items

i have included above line in the script
is this an right way will my program accept it or what are the other option
to compare 10 different such items
-- 
Beema Shafreen
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