听说你也喜欢吃培根？那我们一起来欣赏一段培根的介绍吧：
bacoN is one of aMerICa'S sWEethEartS. it's A dARlinG, SuCCulEnt fOoD tHAt PaIRs FlawLE
什么，不知道要干什么？上面这段巨丑无比的文字，为什么会有大小写呢？你能发现其中的玄机吗？
提交格式：PCTF{你发现的玄机}
刚看到这道题时，觉得应该是数大写字母中间有多少个小写字母，进而对应ascii码表，然而我还是太年轻啊，完全不知道有培根密码这么个东西
试一试，把大写字母换成‘B’，小写字母换成‘A’，就得到了flag
吐槽一句：Google出来的培根密码解码器大多是错的，还要自己写qaq
dicc = {'AAAAA':'a','AAAAB':'b','AAABA':'c','AAABB':'d','AABAA':'e','AABAB':'f',
'AABBA':'g','AABBB':'h','ABAAA':'i/j','ABAAB':'k','ABABA':'l','ABABB':'m',
'ABBAA':'n','ABBAB':'o','ABBBA':'p','ABBBB':'q','BAAAA':'r','BAAAB':'s',
'BAABA':'t','BAABB':'u/v','BABAA':'w','BABAB':'x','BABBA':'y','BABBB':'z'}
init = "bacoN is one of aMerICa'S sWEethEartS. it's A dARlinG, SuCCulEnt fOoD tHAt PaIRs FlawLE"
init = init.replace(' ','').replace('.','').replace(',','').replace("'",'')
l = len(init)
assert l%5 == 0
ans1=''
ans2=''
ans3 = []
ans4 = []
for i in init:
if i.isupper():
ans1 += 'A'
ans2 += 'B'
else:
ans1 += 'B'
ans2 += 'A'
for i in range(l//5):
ans3 .append(ans1[i*5:i*5+5])
ans4 .append(ans2[i*5:i*5+5])
for i in range(len(ans3)):
ans3[i] = dicc[ans3[i]]
for i in range(len(ans4)):
ans4[i] = dicc[ans4[i]]
print(''.join(ans3))
print(''.join(ans4))