13. (5 points)
The 5 members of the Sheep Team are participating in a competitive selection match. 2 of them have only a perfect score in "climbing", another 2 have only a perfect score in "jumping", and 1 person has a perfect score in both "climbing" and "jumping". Now, 2 people need to be selected from these 5 to enter the final, with the requirement that the selected 2 people must include one with a perfect score in "climbing" and one with a perfect score in "jumping". There are $\qquad$ different ways to select them.
$8$