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flag标准格式：EIS{XXXXXX},对长度也做了限制。

关键比较函数。

算法很简单，直接写脚本。

import string

result = ''
tmp = ['0x0D', '0x13', '0x17', '0x11', '0x2', '0x1', '0x20', '0x1D',
       '0x0C', '0x2', '0x19', '0x2F', '0x17', '0x2B', '0x24', '0x1F',
       '0x1E', '0x16', '0x9', '0xF', '0x15', '0x27', '0x13', '0x26',
       '0x0A', '0x2F', '0x1E', '0x1A', '0x2D', '0x0C', '0x22', '0x4']
f = 0
r = ''
comp = 'GONDPHyGjPEKruv{{pj]X@rF'
s = string.printable
print(s)
for i in range(24):
    for x in s:
        j = x
        if 97 <= ord(j) <= 122:
            x = chr(ord(j) - 32)
            f = 1
        if f == 0 and 65 <= ord(j) <= 90:
            x = chr(ord(j) + 32)
        r = chr(int(tmp[i], 16) ^ (ord(x) ^ 0x55) + 72)
        f = 0
        if r == comp[i]:
            result += j
            break
print(result)