Vigenère Cipher Cryptanalysis

Recover a message encrypted using a Vigenère cipher.

The message is lowercase ascii characters only and consists of permuted words from byte-heist.com. The key is 10-19 long.

For example, if the ciphertext is

bzvhljozbrsbulxjcomaezqxgftambtzqxvhukqwgtmlpqy...

corresponding to the key

abcdefghij

you should output the plaintext

byteheistisasitewhereyoucantestyourcodingskills...