About *createmark

Dear All,

I have a question about *createmark. I think this question may be fundamental but since I am new to tcl/tk scripting language, I really need some help with this.

Assume I have chosen a set of nodes by using tcl command as follows:

*createmark nodes 1 'on plane' 0.5 0 0 1 0 0 .0001 1 1

# choose all nodes in that plane

For example in hypermesh it came out with *createmark nodes 1 1-40 121 134

Is there a way that I can select the first and second nodes (1 and 2) inside this mark that I just created and store them into a new mark? I know we can select by choosing them by hand but what I need is a macro that can handle multiple different models so I need to select them using this order.