Woolim Entertainment has revealed a mysterious photo of�INFINITE's Sungjong.

Previously released photos featuring members�L,�Sungyeol,�Sunggyu, Dongwoo, and Woohyun as well as a�video teaser have left fans speculating if there's any connection between the releases.

The agency posted the following message on the group's�official Twitter:�"October 27, 2012. Saturday. Today's raining. Take a look at Sungjong's photo, and have a great weekend. Please look forward to the final image tomorrow."

What is intriguing about the photos is that each member is holding up a sign with a different syllable. So far,�L's says "Na", Sungyeol's says "Neung", Sunggyu's reads "Dae", Dongwoo "Se", Woohyun "Yo", and Sungjong "Bak".�Hoya's photo has yet to be released, and fans are still guessing the complete message.

What do you think it could be?