After we have learnt implementation of Vigenere Cipher let us try if we can decipher such encryption.
Input data: encrypted text - few kilobytes in small latin letters without spaces (but broken into lines for convenience of handling).
Answer should give the key word, used for encryption.
Example:
input data:
ctucclctewsl
answer:
cab
Surely real data are bit longer so that supposedly the text could be decrypted. It is not expected that you write completely automated code-breaker - probably some steps could be manual - but please post as solution any utility program you created to help in this manual labor.