DCTF DEF CAMP Qualif 2018 – Multiple Flags

Challenge

Look, flags everywhere!

The given image contains flag semaphore characters.

They can be decoded considering that:

J could mean "letters from now on" (for the sake of simplicity the " char will be used below);
# means "numbers from now on".

So the message is:

"DCTFSP
ECIALFL
AG#00"A
A#00"AA
#009913
37"DCTF

Giving the following flag:

DCTFSPECIALFLAG00AA00AA00991337DCTF