6 6
 1 4
 4 4
 3 3
 6 4
 6 3
 5 4
 5 6
 3 4
 1 3
 3 2
 5 5
 1 1
 2 1
 3 1
 3 5
 1 6
 6 5
 2 3
 4 3
 2 2
 3 6
 1 2
 6 1
 2 5
 4 5
 1 5
 6 2
 4 6
 5 1
 4 1
 5 2
 2 4
 2 6
 5 3

1/6
 1/2
 1/2
 2/3
 1/6
 1/6
 1/3
 1/6
 1/2
 2/3
 2/3
 1/3
 1/1
 5/6
 2/3
 1/3
 1/6
 1/6
 2/3
 1/2
 5/6
 1/6
 5/6
 1/6
 1/3
 1/3
 1/3
 1/6
 1/6
 1/3
 1/2
 1/3
 1/2
 1/6
 1/3

import java.util.*;

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

        int y = input.nextInt();
        int w = input.nextInt();

        if (y == w) {
            System.out.println("1/1");
        } else {
            if (y > w) {
                switch (y) {
                    case 2:
                        System.out.println("5/6");
                        break;
                    case 3:
                        System.out.println("2/3");
                        break;
                    case 4:
                        System.out.println("1/2");
                        break;
                    case 5:
                        System.out.println("1/3");
                        break;
                    case 1:
                        System.out.println("1/6");
                        break;
                }
            } else {
                switch (w) {
                    case 2:
                        System.out.println("5/6");
                        break;
                    case 3:
                        System.out.println("2/3");
                        break;
                    case 4:
                        System.out.println("3/6");
                        break;
                    case 5:
                        System.out.println("1/3");
                        break;
                    case 1:
                        System.out.println("1/6");
                        break;

                }

            }
        }

        input.close();
    }

}