vowels = 'aeiou'
def remove_vowels(string):
return ''.join(letter for letter in string if letter not in vowels)
print remove_vowels('green eggs and ham')
dm93ZWxzID0gJ2FlaW91JwoKZGVmIHJlbW92ZV92b3dlbHMoc3RyaW5nKToKICAgIHJldHVybiAnJy5qb2luKGxldHRlciBmb3IgbGV0dGVyIGluIHN0cmluZyBpZiBsZXR0ZXIgbm90IGluIHZvd2VscykKCnByaW50IHJlbW92ZV92b3dlbHMoJ2dyZWVuIGVnZ3MgYW5kIGhhbScp