My Mother Is 76 Years Old With Dementia. She Went

my mother is 76 years old with dementia. she went to the emergency room and they said she suffers from Divert iculitis. simply put what are the main foods she should avoid? we have had 3 different opinions and they are different. one said no nuts so she is afraid she can no longer ear her creamy peanut butter. please i would like a simple list i can print out for her to follow. thank you so much for your time. Elaynia