Here is a more efficient way to create your AUTOS data set:
DATA auto;
   do dice1= 1 to 6;
      do dice2= 1 to 6;
         sum_dices = sum(dice1, dice2);
         output;
      end;
   end;
run;
Why do I say more efficient? Can change for 6-sided dice to any N-sided dice where N >= 1. Adding a third, forth or more dice is simple by just adding more do loops, one for each. You can easily examine differences involving more or different numbers of faces on dice.
 
Since 3 6-sided dice has 216 permutations that would be a lot of cards statements to get right.