diff --git a/a.txt b/a.txt
new file mode 100644
index 0000000000000000000000000000000000000000..52b254bca9fca85ea29640fca46c8d48c9ff7148
--- /dev/null
+++ b/a.txt
@@ -0,0 +1 @@
+air
diff --git a/b.txt b/b.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ed6e126068cc48b735c064bb3b4bea2e6d375cd3
--- /dev/null
+++ b/b.txt
@@ -0,0 +1 @@
+bus