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-rw-r--r--prolog/problems/dcg/expr_2/common.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/prolog/problems/dcg/expr_2/common.py b/prolog/problems/dcg/expr_2/common.py
index c24bd4d..0bfcb0b 100644
--- a/prolog/problems/dcg/expr_2/common.py
+++ b/prolog/problems/dcg/expr_2/common.py
@@ -1,6 +1,6 @@
id = 170
number = 90
-visible = True
+visible = False
facts = None
solution = '''\