Visionary=========
Not too much to explain here, just a basic Vigenere cipher. For eachcharacter in the supplied plaintext, we find its position in theheader row of the table. We scan through all the other rows to findout which row has the corresponding ciphertext character in the sameposition. Then we find the position of the flag's ciphertextcharacter in that row, and print out the corresponding character inthe header row, providing us with the flag's plaintext character.Across, straight down, across, straight up.