Is it actually 144? Wouldn't that be the worst case scenario for the attacker? If I understand the whole thing correctly, the attacker can be lucky and find the

Is it actually 144? Wouldn't that be the worst case scenario for the attacker? If I understand the whole thing correctly, the attacker can be lucky and find the right stack of 12 in the first try. So basically, I would set it at around half of the 144: 72 or did I get something wrong there?