CTFtime.org / picoCTF 2022 / substitution1 / Writeup

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[Original writeup](https://github.com/LambdaMamba/CTFwriteups/tree/main/picoCTF_2022/Cryptography/substitution1) (https://github.com/LambdaMamba/CTFwriteups/tree/main/picoCTF_2022/Cryptography/substitution1)