lazy.py

import sys

VOWELS = ('a', 'e', 'i', 'o', 'u')

def convert_word(word):
    first_letter = word[0]
    if first_letter in VOWELS:  
        return word + "hay"     
    else:
        return word[1:] + word[0] + "ay"   

def convert_sentence(sentence):
    list_of_words = sentence.split(' ')
    new_sentence = ""       
    for word in list_of_words:
        new_sentence = new_sentence + convert_word(word)    
        new_sentence = new_sentence + " "
    return new_sentence

print ("Type in a sentence please")
sentence =  sys.stdin.readline()
print (convert_sentence(sentence))