adding a hyphen to the prefix when it is inserted

call.js

@@ -21,12 +21,12 @@ fetch("terms.json")
       nn.querySelector(".actor").innerHTML = choice(terms['actor']);
       nn.querySelector(".action").innerHTML = choice(terms['action']);
       if (randint(0, 2) == 0) {
-        nn.querySelector(".prefix").innerHTML = choice(terms['prefix']);
+        nn.querySelector(".prefix").innerHTML = choice(terms['prefix']) + '-';
       } else {
         nn.querySelector(".prefix").remove();
       }
       nn.querySelector(".sort").innerHTML = choice(terms['sort']);
       nn.querySelector(".media").innerHTML = choice(terms['media']);
     }
-    template.style.visibility = "hidden";
+    template.style.display = "none";
   });