gistfile1.txt

  if choice == "Encrypt"
    File.open('Ruby_Plaintext.txt', 'r') do |text|
	  read_in = text.read.split(" ")
	  
	  File.open('Ruby_Cyphertext.txt', 'w') |output|
	  
	  read_in.each do |plaintext|
	    cyphertext = encrypt(plaintext, key)
		output.write(cyphertext + " ")
	  end
	  
	  output.close
	end