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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;


public class DieRoll {
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		BufferedReader r=new BufferedReader(new InputStreamReader(System.in));
		String s=r.readLine();
		String[] sp=s.split(" ");
		int y=new Integer(sp[0]);
		int w=new Integer(sp[1]);
		int max=Math.max(y, w);
		int tot=6;
		int c=0;
		for(int i=1;i<=6;i++){
			if(i>=max)c++;
		}
		BigInteger num=BigInteger.valueOf(c);
		BigInteger den=BigInteger.valueOf(tot);
		BigInteger gcd=num.gcd(den);
		num=num.divide(gcd);
		den=den.divide(gcd);
		System.out.println(num+"/"+den);
;	}
}

