substitution-0 - picoGym

Link to challenge

This challenge gave a ciphertext which has been encrypted using a substitution cipher. We are given the encrypted message along with the key located at the top of the document.

By using an online substitution cipher and inserting the given values, we are able to find the flag: picoCTF{5UB5717U710N_3V0LU710N_59533A2E}