diff --git a/server/utils/string.js b/server/utils/string.js
new file mode 100644
index 000000000..3683b0936
--- /dev/null
+++ b/server/utils/string.js
@@ -0,0 +1 @@
+module.exports.difference = (a, b) => a.split(b).join("");
\ No newline at end of file