TelePhoneWords.py

'''write a routine that takes a seven digit telephone number 
to print out all possible combinations of the letters or words 
that represent thte given number

 abc def
 1 2 3
ghi jkl mno
 4 5 6
prs tuv wxy
 7 8 9
 * 0 #
'''
digitLetters = {
 2:['a','b','c'],
 3:['d','e','f'],
 4:['g','h','i'],
 5:['j','k','l'],
 6:['m','n','o'],
 7:['p','r','s'],
 8:['t','u','v'],
 9:['w','x','y'],
}

def number_to_words(number):
 '''
 print out all the possible letters or words that represent the given number
 Args: 
 string: 3-3-4 integer string 
 '''
 pass

def words_to_number(word):
 pass