I need to make an excel cell find a value in another cell and if the value is there display a specific word in the selected cell, so basically the text in a1 is either 'a' or 'b' or maybe that value isn't there. So in b1 I need a formula to search a1 for text 'a' or 'b' and if it finds 'a' it displays 'Apple', if it finds 'b' then it displays 'banana' and if it finds neither of those values then it displays 'error'

Please Help Me!!