feed substitution table 代用饲料表
Sadly, you do not remember the substitution table anymore.
遗憾的是，你不记得这个替换表是什么了。
You believe it was encrypted using the substitution table you once had.
你相信它是通过你所掌握的替换表编码得来的。
You decided to try it out: you chose some specific substitution table and used it to encrypt some strings.
你决定亲自试一试：选择一个替换表并用它来编码字符串。
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