import base64
def HELLO():
q=ord('h'.upper())
w=ord('E'.lower())
e=ord('L'.lower())
r=ord('L'.lower())
t=ord('O'.lower())
y=ord(',')
u=ord(' ')
i=ord('W'.lower())
o=ord('O'.lower())
p=ord('R'.lower())
a=ord('L'.lower())
s=ord('D'.lower())
d=ord('!'.lower())
lst=[q,w,e,r,t,y,u,i,o,p,a,s,d]
result = ''
for i in lst:
result += chr(i)
return result
if HELLO()=='Hello, world!':
x = base64.b64encode(HELLO().encode('utf-8'))
for i in range(ord('A'),ord('Z')+1):
if chr(i).lower()=='x':
z = base64.b64decode(x).decode('utf-8')
z = z.replace("'", '')
print(z)
else:
print(0)