#same_index_values
lists = ["a", "b", "c", "d"]
figures = ["a", "x", "c", "d"]
def same_index_values(lists,figures):
    for list in lists :
        for figure in figures :
            if lists.index(list) == figures.index(figure):
                return [lists.index(list)]
   
             
same_index_values(lists,figures)