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.

______,When cool, split layers.,Make filling.,Mix sugar, sour cream and coconut.,Mix well and chill thoroughly.,Reserve 1 cup filling mixture.,Spread the rest between layers of the cake as you stack layers.,Mix reserved 1 cup filling with Cool whip.,Ice top and sides of cake.,Seal in an airtight container.,Refrigerate 3 days before serving.
Mix cake according to directions; bake in 2 layers.