2 files changed, 25 insertions, 0 deletions
diff --git a/prolog/problems/lists/shiftright_2/common.py b/prolog/problems/lists/shiftright_2/common.py
new file mode 100644
index 0000000..3d5c3a5
--- /dev/null
+++ b/prolog/problems/lists/shiftright_2/common.py
@@ -0,0 +1,13 @@
+id = 114
+group = 'lists'
+number = 21
+visible = True
+facts = None
+
+solution = '''\
+conc114([], L, L).
+conc114([H|T], L2, [H|L]) :-
+  conc114(T, L2, L).
+shiftright(L1, [H|T]) :-
+  conc114(T, [H], L1).
+'''
diff --git a/prolog/problems/lists/shiftright_2/en.py b/prolog/problems/lists/shiftright_2/en.py
new file mode 100644
index 0000000..8e2a57c
--- /dev/null
+++ b/prolog/problems/lists/shiftright_2/en.py
@@ -0,0 +1,12 @@
+id = 114
+name = 'shiftright/2'
+slug = 'shift a list right'
+
+description = '''\
+<p><code>shiftright(L1, L2)</code>: the list <code>L2</code> is obtained from L1 by shifting elements to the right by one (circular shift).</p>
+<pre>
+  ?- shiftright([1,2,3,4,5], X).
+    X = [5,1,2,3,4].
+</pre>'''
+
+hint = {}