小心有F射(affine)

题目：

# e(x)=11x+6(mod26)
import string

flag = ""
char = string.ascii_lowercase
print(char)
s = "kesglyueen"
for i in s:
    m = (pow(11, -1, 26) * (ord(i) - ord("a") - 6)) % 26
    flag += char[m]
print(flag)