# echo "1,2,3,7,13 2,3,8,11,13 3,4,5,11,12,13,14,0,6,9 15" | perl venn.pl ;echo
+---------------+---------------+---------------+
| 1 7| 2| 8|
+---------------+---------------+---------------+
| | 3 13| 11|
+---------------+---------------+---------------+
| 0 4 5 6 9 12 14|
+-----------------------------------------------+
10 15