diff --git a/subjects/strisnegative/README.md b/subjects/strisnegative/README.md
index edd8299a7..202a50efb 100644
--- a/subjects/strisnegative/README.md
+++ b/subjects/strisnegative/README.md
@@ -27,6 +27,8 @@ func main() {
 	piscine.StrisNegative("585")
 	piscine.StrisNegative("-58")
 	piscine.StrisNegative("55s44")
+	piscine.StrisNegative("101-1331")
+	piscine.StrisNegative("5544-")
 }
 ```
 
@@ -37,5 +39,7 @@ $ go run .
 P
 N
 !
+!
+!
 ```