problem 4 homework 4

Seminar 4/homework/problem4.md

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+# Find common elements
+
+Given a list of  lists, print the common elements in all lists
+
+The list string is preset in the program and not passed as input.
+
+---
+Sample input:
+``` python
+[[2, 17, 3, 4, 17], [2, 3, 1, 2], [82, 2, 4, 3, 20, 60 , 4, 4]]
+```
+Sample output:
+```
+2, 3
+```
+---
+Sample input:
+``` python
+[['a', 'b', 'c'], ['b', 'c', 'd'], ['c', 'd', 'e']]
+```
+Sample output:
+```
+c
+```