2 files changed, 21 insertions, 0 deletions
diff --git a/prolog/problems/dcg/number_2/common.py b/prolog/problems/dcg/number_2/common.py
new file mode 100644
index 0000000..e248891
--- /dev/null
+++ b/prolog/problems/dcg/number_2/common.py
@@ -0,0 +1,12 @@
+id = 165
+group = 'dcg'
+number = 72
+visible = True
+facts = None
+
+solution = '''\
+digit165 --> ([0] ; [1] ; [2] ; [3] ; [4] ; [5] ; [6] ; [7] ; [8] ; [9]).
+
+number --> digit165.
+number --> digit165, number.
+'''
diff --git a/prolog/problems/dcg/number_2/en.py b/prolog/problems/dcg/number_2/en.py
new file mode 100644
index 0000000..6a3d33e
--- /dev/null
+++ b/prolog/problems/dcg/number_2/en.py
@@ -0,0 +1,9 @@
+id = 165
+name = 'number/2'
+slug = 'numbers with potential leading zeros'
+
+description = '''\
+<p>Write a DCG with the starting symbol <code>number</code> for the language of non-negative integers. The numbers may include leading zeros.</p>
+<p>Example words: <code>123</code>, <code>54</code>, <code>0122</code>, <code>0001221</code>, <code>0</code>.</p>'''
+
+hint = {}