超笨的方法
str_1 = input()
str_2 = ''
alpha_str = 'abcdefghijklmnopqrstuvwxyz'
alpha = list(alpha_str)
alpha_upper = list(alpha_str.upper())
for i in str_1:
if i in alpha[0:3]:
i=2
if i in alpha[3:6]:
i=3
if i in alpha[6:9]:
i=4
if i in alpha[9:12]:
i=5
if i in alpha[12:15]:
i=6
if i in alpha[15:19]:
i=7
if i in alpha[19:22]:
i=8
if i in alpha[22:26]:
i=9
if i in alpha_upper[:-1]:
i = alpha_upper[alpha_upper.index(i)+1].lower()
if i == 'Z':
i = 'a'
str_2 += str(i)
print(str_2)