public class Main {
    public static void main(String [] args){
        //Test Case 1
        checkAppts(10,10,11,11);
        //Test Case 2
        checkAppts(10,12,15,17);
        //Test Case 3
        checkAppts(13,10,14,14);
    }
    private static void checkAppts(int start1, int start2, int end1, int end2){
        int start;
        int end;
        if(start1 > start2)
            start = start1;
        else
            start = start2;
        if(end1 < end2)
            end = end1;
        else
            end = end2;
        if(start < end)
            System.out.println("Appts overlap");
        else
            System.out.println("Appts Dont Overlap");
    }
}