F40P: I can understand you asking the question; but why here? You are on a full TR course surrounded by SFI's. I assume you have seen these symbols in the sim. Was the sim configured in the correct 'customer configuration'? If you are approaching LST it's very late to notice such a thing, and very late to solve a confusion. Given you are almost there - LST - I suggest you need a clear answer PDQ and a local SFI will be your best source.