How to sort a table with conditions of pair of values

I have a table

1 2 3 4
1 2 8 10
4 5 7 9
2 3 6 4
1 2 4 7
2 3 5 3

and I want it to be sorted using as a condition the pair of values existing in the first and the second column and I want to first find all rows according to all possible pairs and then the rest of the rows. The end result of the table should be

1 2 3 4
1 2 4 7
1 2 8 10
2 3 5 3
2 3 6 4
4 5 7 9

How do I sort a table like this? I have no idea what to do and any help would be appreciated.

Answer 1

[Andrei Bobrov]

a = [1 2 3 4
1 2 8 10
4 5 7 9
2 3 6 4
1 2 4 7
2 3 5 3];

out = sortrows(a);