帮你改了一下:
# -*- coding: utf-8 -*-
str1 = '''ACFlCTLIQlAIVMTqHFkswqbDDHtpgcWaXSSglUYKE
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qKWGc'''
res = ''
length = len(str1)
for i, s in enumerate(str1):
if s == '\n':
continue
try:
if s.islower():
if str1[i + 1].isupper():
if str1[i + 2].isupper():
if str1[i + 3].isupper():
if str1[i - 3].isupper():
if str1[i - 2].isupper():
if str1[i - 1].isupper():
if str1[i + 4].islower():
if str1[i - 4].islower():
res += str1[i]
except:
pass
print(res)
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