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

def hcf(x, y):
   if x > y:
       smaller = y
   else:
       smaller = x
   for i in range(1,smaller + 1):
       if((x % i == 0) and (y % i == 0)):
           hcf = i
   return hcf

y,w = input().split()
y = int(y)
w = int(w)
max_vals = max(w,y)
probability = 7 - max_vals
x=int(hcf(probability,6))
probability/=x
print(int(probability), end="")
print("/", end="")
print(int(6/x))