diff --git a/.gitignore b/.gitignore
index 0cafc1c..c136cf9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-.venv/
\ No newline at end of file
+.venv/
+output.txt
\ No newline at end of file
diff --git a/README.md b/README.md
index e533d4c..3c2f9d2 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
-Задание по Python
\ No newline at end of file
+Задание по Python
+
+Прочитать файл data.txt, поменять регистр букв и записать рещультат в output.txt
diff --git a/data.txt b/data.txt
new file mode 100644
index 0000000..ae05791
--- /dev/null
+++ b/data.txt
@@ -0,0 +1,2 @@
+Hello World
+Hello Sailor
\ No newline at end of file
diff --git a/script.py b/script.py
new file mode 100644
index 0000000..5a90bc1
--- /dev/null
+++ b/script.py
@@ -0,0 +1,16 @@
+def convert_case(text):
+    return text.swapcase()
+
+def main():
+    with open('data.txt', 'r') as file:
+        data = file.read()
+
+    converted_data = convert_case(data)
+
+    with open('output.txt', 'w') as file:
+        file.write(converted_data)
+
+    print("Регистр букв изменён. Результат записан в output.txt")
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file