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-rw-r--r--prolog/problems/sets/diff_3/common.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/prolog/problems/sets/diff_3/common.py b/prolog/problems/sets/diff_3/common.py
index 1f00d5c..578d203 100644
--- a/prolog/problems/sets/diff_3/common.py
+++ b/prolog/problems/sets/diff_3/common.py
@@ -5,8 +5,8 @@ import prolog.engine
import server.problems
id = 130
-number = 37
-visible = False
+number = 40
+visible = True
facts = None
solution = '''\