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.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.*;

public class DieRoll {
	public static void main(String[] args) throws Exception {
		InputStreamReader r = new InputStreamReader(System.in);
		BufferedReader br = new BufferedReader(r);
		PrintWriter pw = new PrintWriter(new BufferedWriter(
			new OutputStreamWriter(System.out)));

		String[] input = br.readLine().split(" ");
		int die1 = Integer.parseInt(input[0]);
		int die2 = Integer.parseInt(input[1]);

		int num = 6 - Math.max(die1, die2) + 1;

		if (num == 1) pw.println("1/6");
		else if (num == 2) pw.println("1/3");
		else if (num == 3) pw.println("1/2");
		else if (num == 4) pw.println("2/3");
		else if (num == 5) pw.println("5/6");
		else if (num == 6) pw.println("1/1");

		pw.close();
	}
}
