diff --git a/sample/em.txt b/sample/em.txt
new file mode 100644
index 0000000..1713e5c
--- /dev/null
+++ b/sample/em.txt
@@ -0,0 +1,4 @@
+— — — — — — — —
+ — — — — — — —
+— — — — — — — —
+ — — — — — — —