I'm completely lost now

yoda wrote:Don't have the book with me, so I can't tell you how close you are, but please put potential answers in spoiler tags

Any help I'm completely stuck. I get the pattern is 1 skull 2 hands n a foot but I'm stumped

If I'm right I have

??1635

Am I close

yoda wrote:You appear to have not worked out how to do spoiler tags.

I tried that and still confused by it

Been at it a while,now still don't get it

I get A-S = difference of 18 -1
I get R-C difference of 15 +1

Is this right if not I'm lost

So I have weever am I close

I'm completely stuck can't make out the letters