diff --git a/Object-Oriented Programming/Downcasting/Exercise 1/src/Task.kt b/Object-Oriented Programming/Downcasting/Exercise 1/src/Task.kt
index a9758609..1f2bfa1c 100644
--- a/Object-Oriented Programming/Downcasting/Exercise 1/src/Task.kt	
+++ b/Object-Oriented Programming/Downcasting/Exercise 1/src/Task.kt	
@@ -25,7 +25,7 @@ fun checkAndCall(b: Base) {
 }
 
 fun main() {
-  checkAndCall(Derived1()) // Upcast
+/*  checkAndCall(Derived1()) // Upcast
   checkAndCall(Derived2()) // Upcast
   trace eq """
     Derived1.f()
@@ -33,4 +33,5 @@ fun main() {
     Derived2.f()
     Derived2.h()
   """
+ */
 }
\ No newline at end of file
diff --git a/Object-Oriented Programming/Downcasting/Exercise 1/task-info.yaml b/Object-Oriented Programming/Downcasting/Exercise 1/task-info.yaml
index da98f994..b28c08e8 100644
--- a/Object-Oriented Programming/Downcasting/Exercise 1/task-info.yaml	
+++ b/Object-Oriented Programming/Downcasting/Exercise 1/task-info.yaml	
@@ -4,7 +4,7 @@ files:
   visible: true
   placeholders:
   - offset: 80
-    length: 540
+    length: 361
     placeholder_text: // TODO
 - name: test/Tests.kt
   visible: false
diff --git a/Object-Oriented Programming/Polymorphism/Exercise 1/src/Task.kt b/Object-Oriented Programming/Polymorphism/Exercise 1/src/Task.kt
index da069341..c29ab58a 100644
--- a/Object-Oriented Programming/Polymorphism/Exercise 1/src/Task.kt	
+++ b/Object-Oriented Programming/Polymorphism/Exercise 1/src/Task.kt	
@@ -47,7 +47,7 @@ class Wizard:
 fun Character.playTurn() = name + ": " + play()
 
 fun main() {
-  listOf(
+/*  listOf(
     Warrior(),
     Elf(),
     FightingElf(),
@@ -57,4 +57,5 @@ fun main() {
     "[Warrior: Fight!, Elf: Magic!, " +
     "FightingElf: Magic!Fight!, " +
     "Dragon: Fly!, Wizard: Magic!Fly!]"
+*/
 }
\ No newline at end of file
diff --git a/Object-Oriented Programming/Polymorphism/Exercise 1/task-info.yaml b/Object-Oriented Programming/Polymorphism/Exercise 1/task-info.yaml
index 38d5e4eb..3d86b148 100644
--- a/Object-Oriented Programming/Polymorphism/Exercise 1/task-info.yaml	
+++ b/Object-Oriented Programming/Polymorphism/Exercise 1/task-info.yaml	
@@ -5,12 +5,9 @@ files:
   placeholders:
   - offset: 592
     length: 76
-    placeholder_text: class Dragon
+    placeholder_text: '// class Dragon:'
   - offset: 670
     length: 98
-    placeholder_text: class Wizard
-  - offset: 924
-    length: 13
-    placeholder_text: TODO()
+    placeholder_text: '// class Wizard:'
 - name: test/Tests.kt
   visible: false