Mulla and his friend bought two identical donkeys. "How are we going to tell them apart?" his friend asked. Mulla said, "Easy. I'll cut one ear off my donkey. The one with one ear is mine, the one with two is yours." The next day, Mulla's donkey got into a fight and chewed off the other donkey's ear. "Now what?" the friend asked. "I'll cut off my donkey's other ear," Mulla said. The next day, they found the donkeys fighting again, and now both donkeys had no ears. "What do we do now?!" the friend yelled in frustration. "I'll cut my donkey's tail off," Mulla said. The next day, the donkeys fought again, and both ended up tailless. Infuriated, the friend yelled, "We can't tell them apart at all!" Mulla shrugged. "Fine, don't worry about it. You take the white one, and I'll take the black one."