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.Random;
import java.util.ArrayList;
import java.util.Scanner;
import java.lang.Math; 
import static java.lang.Math.abs;

public class JavaApplication8 {
  public static int function_comp(int x , int y){
        if(x>y)
            return x;
        return y;
 
    }
       public static void function_Rational(double doubleVal , double negligibleRatio )
       {   
          for(int i=1;;i++){
            double tem = doubleVal/(1D/i);
            if(Math.abs(tem-Math.round(tem))<negligibleRatio){
                System.out.println(Math.round(tem)+"/"+i);
                break;
            }
            }
          
       }
       
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int Y =input.nextInt();
int W =input.nextInt();
double prob=0.0;
if(Y == 6 || W == 6 )
{
    prob=0;
}
else if(Y == 0 || W == 0 )
{
    prob=1;
}

else {
int max= function_comp(Y,W);
while(max <7)
{
    prob++;  
    max++;
}

    }
double R=prob / 6;
        function_Rational(R, 0.01);

    }
 
}