add word hint generator script

scripts/dictionary_to_word_hints.py

@@ -0,0 +1,39 @@
+
+import sys
+import string
+
+def filter_hints(words):
+
+    alphabet = set("asdflkjqwerpoiu")
+    hints = set()
+
+    for word in words:
+
+        # hints should be lowercase
+        word = word.lower()
+
+        # hints should be alphabetic
+        if not set(word) <= alphabet:
+            continue
+
+        # hints shouldn't be longer than 5 characters
+        if len(word) > 5:
+            continue
+
+        # hints should not be prefixes of other hints. we prefer the
+        # longer ones.
+        for i in range(len(word)):
+            hints.discard(word[:i+1])
+
+        hints.add(word)
+
+    yield from hints
+
+def main():
+    inlines = (line.rstrip() for line in sys.stdin)
+    outlines = ("{}\n".format(hint) for hint in filter_hints(inlines))
+    sys.stdout.writelines(outlines)
+
+if __name__ == "__main__":
+    main()
+