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qKWGc'''
s , p = 'a' + '' . join(str1 . split('\n')) + 'a' , ''
for k in range(4 , len(s) - 4):
if s[k - 4] . islower() and s[k - 3 : k] . isupper() and s[k] . islower() and s[k + 1 : k + 4] . isupper() and s[k + 4] . islower():
p += s[k]
print(p)
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