import string

def change_vowels_for_numbers(astring):
    """ takes all the vowels in the input and replaces them with
        numbers:
        a,A --> 1, e,E --> 2, i,I --> 3, o,O --> 4, u,U -->5
    """
    result = []
    for letter in astring:
        if letter in 'aA':
            result.append('1')
        elif letter in 'eE':
            result.append('2')
        elif letter in 'iI':
            result.append('3')
        elif letter in 'oO':
            result.append('4')
        elif letter in 'uU':
            result.append('5')
        else:
            result.append(letter)
    return "".join(result)

def is_palindrome(astring):
    """checks whether a string is the same spelled forward or backward."""
    return astring == astring[::-1]

vowels = 'aAeEiIoOuUyY'
consonants = 'bBcCdDfFgGhHjJkKlLmMnNpPqQrRsStTvVxXzZ'
def pig_latin(word):
    if word[0] in vowels:
        if word[-1] in vowels:
            return word+'yay'
        else:
            return word+'ay'
    else:  #string does not start with a vowel
        part1 = []
        part2 = []
        seen_vowel = False
        for letter in word:
            if letter in consonants and not seen_vowel:
                part1.append(letter)
            else:
                seen_vowel = True
                part2.append(letter)
        return ''.join(part2)+''.join(part1)+'ay'

if __name__ == "__main__":
    test = ['pig', 'latin', 'banana', 'happy', 'smile', 'string', 'store',
            'eat', 'omelet', 'egg', 'explain', 'honest']
    for word in test:
        print(word, pig_latin(word))

def is_anagram(one, two):
    """ checks whether these words are anagrams using sorted lists
        and very simple Python constructs.
    """
    def make_list(word):
        result = []
        for letter in word:
            if letter in string.ascii_letters:
                result.append(letter)
        return result

    return sorted(make_list(one))==sorted(make_list(two))