14 files changed, 28 insertions, 0 deletions
diff --git a/prolog/problems/sets/diff_3/common.py b/prolog/problems/sets/diff_3/common.py
index 76b88ed..82a6fe9 100644
--- a/prolog/problems/sets/diff_3/common.py
+++ b/prolog/problems/sets/diff_3/common.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 130
 group = 'sets'
 number = 37
diff --git a/prolog/problems/sets/diff_3/en.py b/prolog/problems/sets/diff_3/en.py
index a2fc55d..7ce6944 100644
--- a/prolog/problems/sets/diff_3/en.py
+++ b/prolog/problems/sets/diff_3/en.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 130
 name = 'diff/3'
 slug = 'find the difference of two sets'
diff --git a/prolog/problems/sets/intersect_3/common.py b/prolog/problems/sets/intersect_3/common.py
index ffa4f89..b2250e6 100644
--- a/prolog/problems/sets/intersect_3/common.py
+++ b/prolog/problems/sets/intersect_3/common.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 129
 group = 'sets'
 number = 36
diff --git a/prolog/problems/sets/intersect_3/en.py b/prolog/problems/sets/intersect_3/en.py
index b4296e4..def0ab5 100644
--- a/prolog/problems/sets/intersect_3/en.py
+++ b/prolog/problems/sets/intersect_3/en.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 129
 name = 'intersect/3'
 slug = 'find the intersection of two sets'
diff --git a/prolog/problems/sets/is_subset_2/common.py b/prolog/problems/sets/is_subset_2/common.py
index 5b365ee..330ca21 100644
--- a/prolog/problems/sets/is_subset_2/common.py
+++ b/prolog/problems/sets/is_subset_2/common.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 132
 group = 'sets'
 number = 39
diff --git a/prolog/problems/sets/is_subset_2/en.py b/prolog/problems/sets/is_subset_2/en.py
index ae2c113..b851d82 100644
--- a/prolog/problems/sets/is_subset_2/en.py
+++ b/prolog/problems/sets/is_subset_2/en.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 132
 name = 'is_subset/2'
 slug = 'check if one set is a subset of another'
diff --git a/prolog/problems/sets/is_superset_2/common.py b/prolog/problems/sets/is_superset_2/common.py
index 364c513..356ca34 100644
--- a/prolog/problems/sets/is_superset_2/common.py
+++ b/prolog/problems/sets/is_superset_2/common.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 131
 group = 'sets'
 number = 38
diff --git a/prolog/problems/sets/is_superset_2/en.py b/prolog/problems/sets/is_superset_2/en.py
index 218c0c8..16b3db0 100644
--- a/prolog/problems/sets/is_superset_2/en.py
+++ b/prolog/problems/sets/is_superset_2/en.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 131
 name = 'is_superset/2'
 slug = 'check if one set is a superset of the other'
diff --git a/prolog/problems/sets/powerset_2/common.py b/prolog/problems/sets/powerset_2/common.py
index 8f3b70e..1561eed 100644
--- a/prolog/problems/sets/powerset_2/common.py
+++ b/prolog/problems/sets/powerset_2/common.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 134
 group = 'sets'
 number = 41
diff --git a/prolog/problems/sets/powerset_2/en.py b/prolog/problems/sets/powerset_2/en.py
index 6471469..dcaee19 100644
--- a/prolog/problems/sets/powerset_2/en.py
+++ b/prolog/problems/sets/powerset_2/en.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 134
 name = 'powerset/2'
 slug = 'find all subsets of a set'
diff --git a/prolog/problems/sets/subset_2/common.py b/prolog/problems/sets/subset_2/common.py
index 7fbbf49..4cc2260 100644
--- a/prolog/problems/sets/subset_2/common.py
+++ b/prolog/problems/sets/subset_2/common.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 133
 group = 'sets'
 number = 40
diff --git a/prolog/problems/sets/subset_2/en.py b/prolog/problems/sets/subset_2/en.py
index 9d9132b..78c1362 100644
--- a/prolog/problems/sets/subset_2/en.py
+++ b/prolog/problems/sets/subset_2/en.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 133
 name = 'subset/2'
 slug = 'generate all subsets of a set'
diff --git a/prolog/problems/sets/union_3/common.py b/prolog/problems/sets/union_3/common.py
index a219673..bd77d3a 100644
--- a/prolog/problems/sets/union_3/common.py
+++ b/prolog/problems/sets/union_3/common.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 128
 group = 'sets'
 number = 35
diff --git a/prolog/problems/sets/union_3/en.py b/prolog/problems/sets/union_3/en.py
index 8257415..1c9379e 100644
--- a/prolog/problems/sets/union_3/en.py
+++ b/prolog/problems/sets/union_3/en.py
@@ -1,3 +1,5 @@
+# coding=utf-8
+
 id = 128
 name = 'union/3'
 slug = 'find the union of two sets'