class a():
    def __init__(self,b):
        self.key = b
    def encode(self,b):
        h = ''
        for i in b:
            h += chr(ord(i) + self.key)
        return h
    def decode(self,b):
        h = ''
        for i in b:
            h += chr(ord(i) - self.key)
        return h
m = a(5)
k = m.encode('hhjj')
print (k)
print (m.decode(k))