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-rw-r--r--prolog/problems/sets/diff_3/common.py1
1 files changed, 0 insertions, 1 deletions
diff --git a/prolog/problems/sets/diff_3/common.py b/prolog/problems/sets/diff_3/common.py
index 82a6fe9..fee93b2 100644
--- a/prolog/problems/sets/diff_3/common.py
+++ b/prolog/problems/sets/diff_3/common.py
@@ -1,7 +1,6 @@
# coding=utf-8
id = 130
-group = 'sets'
number = 37
visible = True
facts = None