Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) congenital sucrase-isomaltase deficiency ?
    ### Response:
    Congenital sucrase-isomaltase deficiency is a disorder that affects a person's ability to digest certain sugars. People with this condition cannot break down the sugars sucrose and maltose. Sucrose (a sugar found in fruits, and also known as table sugar) and maltose (the sugar found in grains) are called disaccharides because they are made of two simple sugars.
    