Lower-case input. Note the use of $.

Author: John Wiseman

README.md

@@ -44,6 +44,8 @@ probability of some small number.
 This code is unoptimized and slow.  If you try to decode more than 3
 or 4 characters, you're going to be waiting a long time.
 
+You can use "$" to indicate the start of a sentence, for example "$obv".
+
 
 ### Corpora
 

decode.py

@@ -125,7 +125,7 @@ def main(argv):
   logger.info('Initializing...')
   decoder = Decoder(args)
   while True:
-    line = raw_input('Enter initials:\n')
+    line = raw_input('Enter initials:\n').lower()
     logger.info('Decoding %r', line)
     result = decoder.decode(line)
     print result