diff --git a/README.md b/README.md
index 5a473d6..d3beddb 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,5 @@ git-hw-to-fork
 ==============
 
 The repository for students to fork (and submt a pull request) in the first git HW
+
+4 + 8 = 12
\ No newline at end of file
diff --git a/README.md~ b/README.md~
new file mode 100644
index 0000000..5a473d6
--- /dev/null
+++ b/README.md~
@@ -0,0 +1,4 @@
+git-hw-to-fork
+==============
+
+The repository for students to fork (and submt a pull request) in the first git HW