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

arg = input()
arg = arg.replace(" ", "")

def Valid(num):
    if num > 0 and num < 8:
        return 1
    else:
        return 0

if Valid(int(arg[0])) and Valid(int(arg[1])):
    yakko = int(arg[0])
    wakko = int(arg[1])
    if yakko >= wakko:
        dot = 6 - yakko + 1
    else:
        dot = 6 - wakko + 1

    from fractions import Fraction as frac
    if frac(dot, 6) == 1:
        print("1/1")
    else: 
        print(frac(dot, 6))
  






    

    


