a- error

undefined local variable or method `shows' for #<#<Class:0x007f8f62ca7828>:0x007f8f62ca3b10>
Extracted source (around line #10):

7:  
8: <li><%= show.day %></li>
9: 
10: <% shows.group_by(&:day).each do |day, shows| %>
11: 	<p><%= day %></p>
12:  		<ul style="width:320px;">
13: 			<% shows.each_with_index do |show, i| %>

show.html.erb

<h1>Listing shows</h1>

<ul>
<% @shows.each do |show| %>

<li><%= show.screening.film.title %> @ <%= show.screening.cinema.name %></li>
 
<li><%= show.day %></li>

<% shows.group_by(&:day).each do |day, shows| %>
	<p><%= day %></p>
 		<ul style="width:320px;">
			<% shows.each_with_index do |show, i| %>
			  <li style="display: inline-block;">
			    <%= ?| if i > 0 %>
			    <%= link_to show.showed_at, show %>                          
			  </li>
			<% end %>
		</ul>
<% end %>


<% end %>

</ul>