Dictionary index and show styling

app/helpers/dictionary_helper.rb

@@ -1,10 +1,14 @@
 module DictionaryHelper
   LETTERS = ['i', 'u', 'e', 'o', 'a', 'm', 'n', 'p', 't', 'k', 's', 'w', 'l', 'j'].sort
 
-  def alphabetical_links
+  def alphabetical_links(letter = nil)
 
     LETTERS.map do |l|
-      link_to l.to_s, dictionary_path(l)
+      if l == letter then
+          "<p class=\"selected-letter\">#{l.to_s}</p>"
+      else
+        link_to l.to_s, dictionary_path(l)#, class: "dictionary_index_links text-center"
+      end
     end.join("\n")
   end
 end