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 code1{
    public static void main(String args[]){
        Scanner ob=new Scanner(System.in);
       // System.out.println("KSJ");
        int a=ob.nextInt();
        int b=ob.nextInt();
        int c=a>b?a:b;
         c=7-c;
        if(c%6==0){
        System.out.println("1/1");System.exit(0);}
        if(c%4==0){
        System.out.println("2/3");System.exit(0);}
        if(c%2==0){
        System.out.println("1/3");System.exit(0);}
        if(c%3==0){
        System.out.println(c/3+"/2");System.exit(0);}
        System.out.println(c+"/6");
    }
}