Time Traveler

The plaintext is written into a square in regular order, left to right, top to bottom. A keyword is used to number the rows and columns and the square is then reordered using those numbers. They like to use Russian words that are found in English. Our spy's keyword was BALALAIKA, which generates the key 518293674. Of course this message is sixty-four letters long, so the key must be an 8-letter word. He told us all the messages he read began with a time-based instruction, like ONE HOUR AFTER ... or TWO HOURS ... Sometimes the ciphertext is taken off by rows and sometimes by columns. It could be either.