Generate a question that has the following answer: "The wet bandits" for the following movie plot: The McCallister family prepares to spend Christmas with Peter and Frank's brother Rob in Paris, gathering at Peter and Kate's home in a suburb of Chicago the night before their flight. Eight-year-old Kevin, their youngest son, finds himself the subject of ridicule from his siblings and cousins. After getting into an argument with his older brother Buzz, he is sent to the third floor bedroom of the house, where he wishes his family would disappear. During the night, a power outage resets the alarm clocks and causes the family to oversleep. In the confusion and rush to reach the airport on time, Kevin is left behind and the family does not realize it until they are already airborne. Once in Paris, his mother and father desperately try to book a flight home.Meanwhile, Kevin wakes up to find the house empty and is overjoyed to find that his wish came true. He takes Buzz's life savings, practices shooting with Buzz's BB gun, jumps on the bed, watches a gangster film, and eats a large amount of junk food. However, he finds himself scared by the appearance of the Chicago Police Department called by his parents to check on him, his next door neighbor "Old Man" Marley, who was rumored to have murdered his family many years earlier, and the appearance of The Wet Bandits, Harry Lyme and Marv Merchants, who are breaking into other vacant houses on the block.On Christmas Eve, Kevin overhears Harry and Marv discussing plans for breaking into his house that night. After conversing with a Santa Claus impersonator and watching a local choir perform in a church, he comes across Marley. The two of them talk, and he learns that Marley is in fact a very nice man and the rumors about him are not true. He tells Kevin he is watching the choir because his granddaughter is in it, and he never gets to see her because he and his son have not spoken in years after a big argument they had. Kevin advises him to reconcile with his son.After leaving the church, Kevin heads home and sets up various booby traps inside the house. Harry and Marv...
What was the call sihgn of the robbers?