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-rw-r--r--prolog/problems/dcg/expr_3/common.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/prolog/problems/dcg/expr_3/common.py b/prolog/problems/dcg/expr_3/common.py
index 57f5d64..6b99ab9 100644
--- a/prolog/problems/dcg/expr_3/common.py
+++ b/prolog/problems/dcg/expr_3/common.py
@@ -1,6 +1,6 @@
id = 171
number = 100
-visible = True
+visible = False
facts = None
solution = '''\