diff --git a/d12/cmd.txt b/d12/cmd.txt
new file mode 100644
index 0000000..ea1a8c3
--- /dev/null
+++ b/d12/cmd.txt
@@ -0,0 +1,3 @@
+
+jq '.' input | grep -o -E '\-?[0-9]+' | sum0
+
diff --git a/d12/run.py b/d12/run.py
new file mode 100644
index 0000000..e95eeae
--- /dev/null
+++ b/d12/run.py
@@ -0,0 +1,23 @@
+import sys
+import json
+
+
+def sum_of_item(item, skip_red=False):
+
+    if isinstance(item, list):
+        return sum(sum_of_item(i, skip_red) for i in item)
+
+    if isinstance(item, dict):
+        if skip_red and 'red' in item.values():
+            return 0
+        return sum(sum_of_item(i, skip_red) for i in item.values())
+
+    if isinstance(item, str):
+        return 0
+
+    if isinstance(item, int):
+        return item
+
+abacus = json.load(sys.stdin)
+print(sum_of_item(abacus))
+print(sum_of_item(abacus, skip_red=True))