import java.util.Scanner;

public class Reservation {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int dayOfReservation = Integer.parseInt(scanner.nextLine());
        int mountOfReservation = Integer.parseInt(scanner.nextLine());
        int dayOfArrive = Integer.parseInt(scanner.nextLine());
        int mountArrive = Integer.parseInt(scanner.nextLine());
        int dayLeaving = Integer.parseInt(scanner.nextLine());
        int mountLeaving = Integer.parseInt(scanner.nextLine());

        int differenceDay = dayOfArrive-dayOfReservation;
        int differenceMount = mountArrive-mountOfReservation;

        if(differenceMount>=1){
            int price = 25;
            double totalPrice = (dayLeaving-dayOfArrive)*price*0.80;
            System.out.printf("Your stay from %d/%d to %d/%d ",dayOfArrive,mountArrive,dayLeaving,mountLeaving);
            System.out.printf("will cost %.2f",totalPrice);


        }else if(differenceDay>=10 && differenceMount == 0){
            int price = 25;
            int totalPrice = (dayLeaving-dayOfArrive)*price;
            System.out.printf("Your stay from %d/%d to %d/%d ",dayOfArrive,mountArrive,dayLeaving,mountLeaving);
            System.out.printf("will cost %.2d",totalPrice);
        }else if(differenceDay<10 && differenceMount == 0){
            int totalPrice = (dayLeaving-dayOfArrive)*30;
            System.out.printf("Your stay from %d/%d to %d/%d ",dayOfArrive,mountArrive,dayLeaving,mountLeaving);
            System.out.printf("will cost %.2d",totalPrice);
        }



    }
}