循环太复杂，宁愿写多亿点

minwen = [0,1,2,3,4,5,6,7,8,9,]
n = input()
m = []
for i in n:
    m.append(i)

for i in range(len(m)):
    p = m[i]
    if p == '0':
        m[i] = 'a'
        continue
    elif p == '1':
        m[i] = 'b'
        continue
    elif p == '2':
        m[i] = 'c'
        continue
    elif p == '3':
        m[i] = 'd'
        continue
    elif p == '4':
        m[i] = 'e'
        continue
    elif p == '5':
        m[i] = 'f'
        continue
    elif p == '6':
        m[i] = 'g'
        continue
    elif p == '7':
        m[i] = 'h'
        continue
    elif p == '8':
        m[i] = 'i'
        continue
    elif p == '9':
        m[i] = 'j'
        continue
    elif p == 'k':
        m[i] = 'z'
        continue
    elif p == 'l':
        m[i] = 'y'
        continue
    elif p == 'm':
        m[i] = 'x'
        continue
    elif p == 'n':
        m[i] = 'w'
        continue
    elif p == 'o':
        m[i] = 'v'
        continue
    elif p == 'p':
        m[i] = 'u'
        continue
    elif p == 'q':
        m[i] = 't'
        continue
    elif p == 'r':
        m[i] = 's'
        continue
    elif p == 'a':
        m[i] = '0'
        continue
    elif p == 'b':
        m[i] = '1'
        continue
    elif p == 'c':
        m[i] = '2'
        continue
    elif p == 'd':
        m[i] = '3'
        continue
    elif p == 'e':
        m[i] = '4'
        continue
    elif p == 'f':
        m[i] = '5'
        continue
    elif p == 'g':
        m[i] = '6'
        continue
    elif p == 'h':
        m[i] = '7'
        continue
    elif p == 'i':
        m[i] = '8'
        continue
    elif p == 'j':
        m[i] = '9'
        continue
    elif p == 'z':
        m[i] = 'k'
        continue
    elif p == 'y':
        m[i] = 'l'
        continue
    elif p == 'x':
        m[i] = 'm'
        continue
    elif p == 'w':
        m[i] = 'n'
        continue
    elif p == 'v':
        m[i] = 'o'
        continue
    elif p == 'c':
        m[i] = 'p'
        continue
    elif p == 'u':
        m[i] = 'p'
        continue
    elif p == 't':
        m[i] = 'q'
        continue
    elif p == 's':
        m[i] = 'r'
        continue
for i in range(len(m)):
    print(m[i],end='')

100 Accepted

反正变量名可以是中文，那作为一个中国人，变量名用中文不过分吧？

加密口令=list(input())
明码口令=''
for i in 加密口令:
    if(i>='a' and i<='j'):
        明码口令+=str(chr(ord(i)-ord('a')+ord('0')))
    elif(i>='0' and i<='9'):
        明码口令+=str(chr(ord(i)-ord('0')+ord('a')))
    elif(i>='k' and i<='r'):
        明码口令+=str(chr(ord('z')-(ord(i)-ord('k'))))
    elif(i>='s' and i<='z'):
        明码口令+=str(chr(ord('k')+(ord('z')-ord(i))))
print(明码口令)