# -*- coding: utf-8 -*-

# Goals: learn how to accept input from the command line (e.g. python 6.py "A String")
# learn how to write a one-line for loop with an if statement

import sys
import getopt
import string

def usage():
  print "String Disemvoweler:"
  print "Syntax: python 6.py [options] string"
  print
  print "Options:"
  print "-c: print only the consonants in the string (default option)"
  print "-v: print only the vowels in the string"
  print
  print "These options are mutually exclusive."
  
  sys.exit(2)     

try:
  opts, args = getopt.getopt(sys.argv[1:], "cv")
except getopt.GetoptError:          
  usage()

if len(opts) > 1:
  usage()
elif len(opts) < 1:
  option = "-c"
else:
  option = opts[0][0]

thestring = " ".join(args)

if thestring.strip() == "":
  usage()
  sys.exit(2)


vowels = "aeiouAEIOU"
consonants = "".join(char for char in string.letters if not char in vowels)

vowels = vowels + string.punctuation + string.whitespace
consonants = consonants + string.punctuation + string.whitespace

if option == "-c":
  print "".join(char for char in thestring if char in consonants)
else:
  print "".join(char for char in thestring if char in vowels)