You will be given a definition of a task first, then some input of the task.
In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

______,,Cover and cook on low-heat setting about 1-1/2 hours or until mixture is melted and smooth, stirring every 30 minutes. Add cereal, dried cranberries, and pistachios, stirring gently to coat evenly.,,Using a buttered 1/4-cup cookie scoop or buttered hands, shape mixture into 36 balls; place on a buttered sheet of foil. Let stand at room temperature until firm and no longer sticky.
Output:
Butter the inside of a 4- to 6-quart slow cooker. In the prepared cooker combine marshmallows and 6 tablespoons butter.