diff --git a/count_parentheses.py b/count_parentheses.py
new file mode 100644
index 0000000..54cac13
--- /dev/null
+++ b/count_parentheses.py
@@ -0,0 +1,24 @@
+import json
+from argparse import ArgumentParser
+from pathlib import Path
+from typing import Counter
+
+
+def main():
+    parser = ArgumentParser()
+    parser.add_argument("path", type=Path)
+    args = parser.parse_args()
+
+    chars = Counter[str]()
+    with open(args.path) as f:
+        print("Reading lines")
+        for line in f:
+            content = json.loads(line)["content"]
+            chars += Counter(content)
+
+    for c in "()[]{}<>":
+        print(f"{c} - {chars[c]:6}")
+
+
+if __name__ == "__main__":
+    main()