diff --git a/hanzi-flash/README.md b/hanzi-flash/README.md
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+++ b/hanzi-flash/README.md
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+# hanzi-flash
+
+Generate flashcards for a range of frequent hanzi characters.
+
+You need the [hanziDB CSV](https://github.com/ruddfawcett/hanziDB.csv) file for this to work.
diff --git a/hanzi-flash/hanzi_flash.py b/hanzi-flash/hanzi_flash.py
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+++ b/hanzi-flash/hanzi_flash.py
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+#!/usr/bin/env python3
+"""
+Generate flashcards for a range of frequent hanzi characters.
+
+Based on https://github.com/ruddfawcett/hanziDB.csv
+"""
+
+import csv
+import itertools
+import argparse
+from pathlib import Path
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-s", "--start", default=0, type=int)
+parser.add_argument("-e", "--end", default=99999999, type=int)
+parser.add_argument("-O", "--output", default="hanzi_flash.csv", type=Path)
+parser.add_argument("-i", "--input", default="hanzi_db.csv", type=Path)
+args = parser.parse_args()
+
+with open(args.input) as csv_file:
+    reader = csv.reader(csv_file)
+    with open(args.output, "w") as outp_file:
+        writer = csv.writer(outp_file)
+        for row in itertools.islice(reader, args.start, args.end + 1):
+            writer.writerow([row[1], f"{row[2]} ({row[3]})"])