diff --git a/python/educational-core/student/src/com/jetbrains/edu/learning/core/EduDocumentListener.java b/python/educational-core/student/src/com/jetbrains/edu/learning/core/EduDocumentListener.java
index 61cf2c5c3845..8cb13731ac97 100644
--- a/python/educational-core/student/src/com/jetbrains/edu/learning/core/EduDocumentListener.java
+++ b/python/educational-core/student/src/com/jetbrains/edu/learning/core/EduDocumentListener.java
@@ -73,7 +73,7 @@ public class EduDocumentListener extends DocumentAdapter {
           if (answerPlaceholder.getUseLength()) {
             answerPlaceholder.setLength(length);
           } else {
-            answerPlaceholder.setPossibleAnswer(document.getText(TextRange.create(twStart, twStart + answerPlaceholder.getRealLength())));
+            answerPlaceholder.setPossibleAnswer(document.getText(TextRange.create(twStart, twStart + length)));
           }
         }
       }