If a person is paying up 2 car loans and then can't afford one of them, which one gets repossessed?

I have a loan on a car from 4 years ago, then I took a loan out on another car 3 years later. Now I have 2 loans on 2 different cars. But now I can't afford both of them so I am going to have to give one up. The loans are with the same lending company. Do I have a choice on which one they will repossess or do they choose?