diff --git a/c.dat b/c.dat
new file mode 100644
index 0000000..abf0aec
--- /dev/null
+++ b/c.dat
@@ -0,0 +1 @@
+this is text C
diff --git a/d.dat b/d.dat
new file mode 100644
index 0000000..90f1a88
--- /dev/null
+++ b/d.dat
@@ -0,0 +1 @@
+master improved
diff --git a/e.dat b/e.dat
new file mode 100644
index 0000000..4231679
--- /dev/null
+++ b/e.dat
@@ -0,0 +1 @@
+master imroved twice