(Skytale) The following text has been encrypted using a skytale (and removing resulting spaces); to make the ciphertext easier to read I have split the letters into blocks of 5. Recover the plaintext, and include a description of how you found the plaintext (including failed attempts). You know that the number of columns is between 5 and 10.

Please explain how you decode

"YVKEO EECUB NOHRT DAOHE