Bank Cooperation

The ‘Money Heists’ have robbed gold bars from 8 banks. But soon the professor finds out that, to trap them, a few banks have started cooperating. The banks have embedded a special kind of detector into the gold bar such that if gold from their bank is placed inside the same container as that of the co-operating bank, the police will be alerted. Since no one wants the ‘Money Heists’ to be caught y