#!/usr/bin/env python
"""
alphabet learning system
"""
import re, sys
sys.path.append('/home/user/.pylib/')
from utils import freq
import codecs
from unicodedata import category
sys.stdin = codecs.getreader('utf-8')(sys.stdin)
sys.stdout = codecs.getwriter('utf-8')(sys.stdout)

class Lexicon:
	"""
	The total lexicon from the input word pairs.
	"""
	def __init__(self):
		pass
	
class Vocabulary:
	"""
	the subset of Lexicon which the learner has seen
	"""
	def __init__(self):
		pass


class Wordset:
	def __init__(self, words, lexicon):
		self.lexicon = lexicon
		self.words = words

class Level:
	def __init__(self, letters, lexicon):
		self.letters = letters
		self.lexicon = lexicon
		self.pattern = regexify(letters)
		self.
		
	def html(self):
		pass