Challenge Seven - second clue

Still stuck? Once you rearrange the columns using the keyword you need to work out the subsitution. It looks tricky since each plaintext character is substituted by a pair of characters, but it is still a substitution cipher. If it makes it easier, just replace each pair (AA, AD, AF etc.) by a sinlge symbol from the set A-Z together with the integers 0 to 9, then treat the result as a simple substitution cipher. Good luck,