|Do you know where your variables are?|
Care to clarify that? Maybe add some examples? Cos like JavaFan, I don't get it.
As soon as you pick any two values from group 2 (1..6), you've also already picked two values from group 1 (0..7), so there is no way to comply with your "every resulting row should satisfy the initial condition" requirement.
You would either a) a pick two from both groups and therefore have 4 from the larger group; or b) pick nothing from the larger group, in which case you have nothing from the larger group.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
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