diff --git a/README.html b/README.html
index e53bfa6..8859d94 100644
--- a/README.html
+++ b/README.html
@@ -52,7 +52,8 @@ $ ./dumppdf.py foo.pdf
 <p>
 <strong>Extract the text:</strong>
 <blockquote><pre>
-$ ./pdf2txt.py foo.pdf &gt; foo.xml
+$ ./pdf2txt.py samples/naacl06-shinyama.pdf
+$ ./pdf2txt.py -c euc-jp samples/jo.pdf
 </pre></blockquote>
 
 <hr>
diff --git a/conv_cmap.py b/conv_cmap.py
index d1e5385..ef9830d 100755
--- a/conv_cmap.py
+++ b/conv_cmap.py
@@ -23,7 +23,7 @@ def dumpcdb(cmap, cdbfile, verbose=1):
 def convert_cmap(files, cmapdir, cdbcmapdir, force=False):
   from cmap import CMapDB
   CMapDB.initialize(cmapdir)
-  for fname in fiels:
+  for fname in files:
     cmapname = os.path.basename(fname)
     cdbname = os.path.join(cdbcmapdir, cmapname+'.cmap.cdb')
     if not force and os.path.exists(cdbname):
diff --git a/samples/jo.pdf b/samples/jo.pdf
new file mode 100644
index 0000000..53b1b1e
Binary files /dev/null and b/samples/jo.pdf differ
diff --git a/samples/naacl06-shinyama.pdf b/samples/naacl06-shinyama.pdf
new file mode 100644
index 0000000..e14c8f9
Binary files /dev/null and b/samples/naacl06-shinyama.pdf differ
diff --git a/utils.py b/utils.py
index 5ceb333..9d9eeef 100644
--- a/utils.py
+++ b/utils.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+from struct import pack, unpack
 
 ##  Utilities
 ##