diff --git a/src/main/java/PostfixStringFilter.java b/src/main/java/PostfixStringFilter.java
index 2359bd7c769719c1aa56a374fdde9a0df4450c95..8154fc65d951535b78d14d2cc67e3445a39efa7d 100644
--- a/src/main/java/PostfixStringFilter.java
+++ b/src/main/java/PostfixStringFilter.java
@@ -7,7 +7,8 @@ public class PostfixStringFilter implements StringFilter{
     }
 
     @Override
-    public String filter(String string) {
+
+    public String  filter(String string) {
         return string.substring(string.length() - n, string.length());
     }
 }