diff --git a/lec_4/example.txt b/lec_4/example.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0ce2233f70cfda2e29a73ddfd58801b2063db6d3
--- /dev/null
+++ b/lec_4/example.txt
@@ -0,0 +1,3 @@
+This is the first line of the file.
+Here is the second line.
+And this is the third line.
diff --git a/lec_4/persons.csv b/lec_4/persons.csv
new file mode 100644
index 0000000000000000000000000000000000000000..722e1525ca3a4424fd7114b8d361beeb8c3242dc
--- /dev/null
+++ b/lec_4/persons.csv
@@ -0,0 +1,4 @@
+Name,Age,Country
+Alice,20,Austria
+Bob,25,Germany
+Eve,30,Switzerland