using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using static System.Console;
using static System.Math;

class Program
{
    static void Main(string[] args)
    {
        string[] s = ReadLine().Split(' ');
        WriteLine(s.Count(x => x == "Sat" || x == "Sun") == 2 ? "8/33" :
            s.Count(x => x == "Sat" || x == "Sun") == 1 ? "8/32" : "8/31");
    }
}