Combination of multiple rows

Hi,

I'm trying to make combinations of six of a matrix with two columns and six rows. For example: [2 4; 6 8; 10 12;1 3; 5 7; 9 11]. Two numbers in a same row don't make a combination. For example: a combination with 9 and 11 isn't a good combination. I've tried using 'nchoosek' and then deleting the combinations that have numbers in the same row, but I get an answer that has some combinations that aren't allowed.

code
 %
t = [x(:,1);x(:,2)];
C = nchoosek(t,6);
lengte = size(C,1);
for i = 1:lengte
 for j = 1:6
      if max(C(i,:)==x(j,1)) || max(C(i,:)==x(j,2)) 
        C(i,:) = [];
        lengte = size(C,1);
      end
 end
end

I've also tried deleting using the following code, but it didn't helped:

code
  % 
for i = 1:6
   C = C(any(C==(x(i,1)),2),:) & C(any(C==(x(i,2)),2),:);
end
end

I would really appreciate if any suggestions might be given.

With kind regards

[TastyPastry]

What's the output you're looking for?