diff --git a/1_6.lua_test/1_2.test_str_sub_from_last.lua b/1_6.lua_test/1_2.test_str_sub_from_last.lua
new file mode 100644
index 0000000..9fcf674
--- /dev/null
+++ b/1_6.lua_test/1_2.test_str_sub_from_last.lua
@@ -0,0 +1,2 @@
+local str = "hello world!"
+print(string.sub(str, -3, -1))