Problem $1(1\%).$ Given a ciphertext JSSXFEPP encrypted by Shift Cipher, compute the key of shift cipher and the original message using brute$-$force attacks. In this problem, we assume the original message is English and is human$-$readable. The message space includes all the lower case characters, i$.$e$.,$ M $=\{$a$,$b$,...,$z$\},$ key space is K $=\{0,1,...,25\}$ and ciphertext space is C $=\{$A$,$B$,...,$Z$\}.$