From 732b8f42029eced5e53debbff367131c2ea366ee Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@fri.uni-lj.si>
Date: Sun, 3 Apr 2016 18:11:08 +0200
Subject: Prolog: add introduction for the sets group and make it visible

---
 prolog/problems/sets/union_3/common.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'prolog/problems/sets/union_3')

diff --git a/prolog/problems/sets/union_3/common.py b/prolog/problems/sets/union_3/common.py
index c955fef..f358744 100644
--- a/prolog/problems/sets/union_3/common.py
+++ b/prolog/problems/sets/union_3/common.py
@@ -5,8 +5,8 @@ import prolog.engine
 import server.problems
 
 id = 128
-number = 35
-visible = False
+number = 20
+visible = True
 facts = None
 
 solution = '''\
-- 
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