public static void main(String[] args){

    Scanner input = new Scanner(System.in);

    String[] ips = new String[4]; for(int i=0; i<4; i++){
        ips[i] = input.nextLine();
    } int ip1,ip2,ip3,ip4;
    String[] tmp = new String[4]; for(int i=0; i<4; i++){
        tmp[i] = (ips[i].split("\\."))[0];
    }
    ip1 = Integer.parseInt(tmp[0]);
    ip2 = Integer.parseInt(tmp[1]);
    ip3 = Integer.parseInt(tmp[2]);
    ip4 = Integer.parseInt(tmp[3]); //不相交  if(ip1 <= ip2){ if((ip3<ip1 && ip4<ip1) || (ip3>ip2 && ip4>ip2)){
            System.out.println(" No Overlap IP");
        }else{
            System.out.println("Overlap IP");
        }
    }else{ if((ip3<ip2 && ip4<ip2) || (ip3>ip1 && ip4>ip1)){
            System.out.println(" No Overlap IP");
        }else{
            System.out.println("Overlap IP");
        }
    }



}