list a;
default
{
    state_entry()
    {
        a=["num1", "num2", "command", "num1", "num2", "command"];
//a = [0,1,2,3,4,5,6];
        llSay(0, "Hello " + (string)  a);


    }

    touch_start(integer total_number)
    {
        llSay(0, "Touched.");
   list lCommands = llList2ListStrided(a,2,-1,3);
         llSay(0, "try: " + (string) lCommands);
     }
}