@Dutchy,
Thanks Imur for your explanations, you are obviously a lot better at the cryptics than me.
Thanks also for your comments Shirlz, I am a great grandmother and I had to use computors when I came to Canberra in 1990, I thought they might blow up when I touched them. I now have a grandson who is a whiz on computors so he helps me. I have learnt a bit about this site this weekend so thanks everyone.
Regards jacaranda