How to define contact surface using selecting the elements ?

How to create any contact surface from the given menu (image) attached below

https://drive.google.com/file/d/0B2rIYPnVjYNESUFvQXVGaVZsX0U/view?usp=sharing

Here is the problem i want to get resolved

https://drive.google.com/file/d/0B2rIYPnVjYNEdkVKNmxyWHN1WWc/view?usp=sharing

Note: I use abaqus for solving