Step 3

loop do
	puts "The (L) Train, The (N) Train, The (S)ix Train"
	puts "Do you wish to quit?"
	continue = gets.chomp
	if continue == "Yes"	
		puts "Thank You"
		break
	else
		puts "Choose a train line by letter."
	end
	selection = gets.chomp.to_s

	if selection == "L"
		puts "You selected the L train."
		puts "8th Ave, 6th Ave, Union Square, 3rd Ave, 1st Ave, Bedford Ave"
	elsif selection == "N"
		puts "You selected the N train."
		puts "Times Square, Herald Square, 28th St, 23rd St - HMH Nexus, 
		Union Square, 8th Ave"
	elsif selection == "S"
		puts "You selected the Six Train."
		puts "Grand Central, 33rd St, 28th St, 23rd St, Union Square, Astor Place"
	else
		puts "That's not one of the choices."
	end			

	puts "Thank You"
end