static void Main(string[] args)
{
string[] cases = Console.ReadLine().Split(' ');
int max = Math.Max(int.Parse(cases[0]), int.Parse(cases[1]));
int wins = 0;
while (max <= 6)
{
max++;
wins++;
}
switch (wins)
{
case 1:
Console.WriteLine("1/6");
break;
case 2:
Console.WriteLine("1/3");
break;
case 3:
Console.WriteLine("1/2");
break;
case 4:
Console.WriteLine("2/3");
break;
case 5:
Console.WriteLine("5/6");
break;
case 6:
Console.WriteLine("1/1");
break;
}
Console.ReadLine();
}