--- exercises/024_errors4.zig	2023-10-03 22:15:22.122241138 +0200
+++ answers/024_errors4.zig	2023-10-05 20:04:06.949431550 +0200
@@ -59,7 +59,13 @@
     // If we get a TooSmall error, we should return 10.
     // If we get any other error, we should return that error.
     // Otherwise, we return the u32 number.
-    return detectProblems(n) ???;
+    return detectProblems(n) catch |err| {
+        if (err == MyNumberError.TooSmall) {
+            return 10;
+        }
+
+        return err;
+    };
 }
 
 fn detectProblems(n: u32) MyNumberError!u32 {