# Solutions
# cipher.py

# Ask for user input: a string to encrypt and an integer shift value.
sentence = raw_input('Enter sentence to encrypt: ')
shift_val = input('Enter shift value: ')

# Ensure valid shift value.
if shift_val < 0 or shift_val >= 26:
  print 'Please enter a number between 0 and 25.'

else: 
  encoded_phrase = ''

  for letter in sentence:
    letter_ord = ord(letter)
    # Deal with capital letters.
    if letter_ord >= 65 and letter_ord <= 90:
      if shift_val + letter_ord > 90:
        letter_ord -= 26
      letter_ord += shift_val
    # Deal with lower case letters.
    elif letter_ord >= 97 and letter_ord <= 122:
      if shift_val + letter_ord > 122:
        letter_ord -= 26
      letter_ord += shift_val
    # Add the next character to the encoded phrase so far.
    encoded_phrase = encoded_phrase + chr(letter_ord)

  print 'The encoded phrase is: %s' % encoded_phrase