diff --git a/exercises/00_intro/intro1.rs b/exercises/00_intro/intro1.rs
index bdbf34b..22544cd 100644
--- a/exercises/00_intro/intro1.rs
+++ b/exercises/00_intro/intro1.rs
@@ -1,5 +1,5 @@
-// We sometimes encourage you to keep trying things on a given exercise, even
-// after you already figured it out. If you got everything working and feel
+// TODO: We sometimes encourage you to keep trying things on a given exercise,
+// even after you already figured it out. If you got everything working and feel
 // ready for the next exercise, enter `n` in the terminal.
 //
 // The exercise file will be reloaded when you change one of the lines below!
diff --git a/exercises/00_intro/intro2.rs b/exercises/00_intro/intro2.rs
index e443ec8..c6cb645 100644
--- a/exercises/00_intro/intro2.rs
+++ b/exercises/00_intro/intro2.rs
@@ -1,5 +1,4 @@
-// TODO: Fix the code to print "Hello world!".
-
 fn main() {
+    // TODO: Fix the code to print "Hello world!".
     printline!("Hello world!");
 }
diff --git a/exercises/01_variables/variables4.rs b/exercises/01_variables/variables4.rs
index 8634ceb..6c138b1 100644
--- a/exercises/01_variables/variables4.rs
+++ b/exercises/01_variables/variables4.rs
@@ -1,5 +1,4 @@
 // TODO: Fix the compiler error.
-
 fn main() {
     let x = 3;
     println!("Number {x}");