A child is 1-year-old. After solid food was introduced into the diet, within the last several months the child developed loss of appetite, diarrhea with large amount of feces, and occasional vomiting. Body temperature remains normal. Body weight is 7 kg. The child is very pale, has leg edemas and an extremely distended abdomen. Feces analysis detects high levels of fatty acids and soups. Diagnosis of celiac disease was made and gluten-free diet was prescribed. What should be excluded from the diet in this case?