Given the following class definition, public class Service { private int type; public Service(int type) { this.type = type; this.type ++; System.out.print(this.type + "-"); } } public class WalkTogether extends Service { private int length; public WalkTogether(int type, int length) { super(type); this.length = length; this.length --; System.out.print(this.length + "-"); } } What is the output of the following code? WalkTogether arrange = new WalkTogether(2, 5); If there is no output, please specify "nothing" (no quotes) in the blank for the output..