Glory of the garden - PicoCTF

Translate the string into unicode and insert it into a variable, then treat the encryption as a mathematical function and try to obtain a reverse formula. Imagine that A and B are the characters that, when mixed as described in the challenge description, generate the first character of the encoded text. To retrieve A, just push the encoded character 8 places to the right, so to clean all values that were influenced by the value of B.To retrieve B, you now have the encoded value and A itself: wha...