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.*;
import java.io.*;
public class xyz{
    public static void main(String args[])
    {
        Scanner x = new Scanner(System.in);
        long y=x.nextLong(),z=x.nextLong(),w,v;
        if(y>=z)
        {
            w = y;
        }
        else
        w=z;
        v = 6-w+1;
        if(v==1)
        System.out.println("1/6");
        if(v==2)
        System.out.println("1/3");
        if(v==3)
        System.out.println("1/2");
        if(v==4)
        System.out.println("2/3");
        if(v==5)
        System.out.println("5/6");
        if(v==6)
        System.out.println("1");
        }
}