You have already figured out that Alice and Bob are using Diffie$-$Hellman key exchange with $24-$bit keys. Before he was captured yesterday, your teammate Mike obtained their public DH parameters:

$G=2$

$P=08c94cb$

alicePublic $=0793$ffe

bobPublic $=077d960$

The morning of the anticipated Zoo rendezvous, you encounter a new message at their dead$-$drop in Prospect Park. It contains only the characters btJ$5-$ you remember it as "bravo tango JULIET five." What could it mean? You leave the message in place so they can continue to arrange the meet.

Alice and Bob may be aware of our Assignment $1$ algorithms that use Base$64$ encodings. $($I won't go after one of you for leaking it because, after all, Kerckhoff says it's the keys that should be secret, not the algorithm.$)$ So we should be able to run decryptBytes$64("$btJ$5",$ secret$)-$ except that we don't know their secret. Fortunately, Alice and Bob chose a small key size. With $24$ bits there are around $16$ million possibilities, but a clever Python program should be able to grind through those within a few minutes. Maybe we can brute$-$force their respective secrets and use them to decode the message?