I thought that all witches were wicked," she said slowly.
"No, that's not true," the Good Witch of the North replied. "There were four witches in the Land of Oz-two were good and two were bad. But now, thanks to you, there is only one wicked witch-the Wicked Witch of the West.There is a wizard too. He is the Great Wizard of Oz and he lives in the Emerald City.