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

Yako,Wako=map(int,input().split())
x=[1,2,3,4,5,6]
x1=[]
for i in range(6):
    if x[i]>=max(Yako,Wako):
        x1.append(x[i])
Dot=len(x1)
if 6%Dot==0:
    print(Dot//Dot,"/",6//Dot,sep='')
elif Dot%2==0:
    print(Dot//2,"/",6//2,sep='')
else:
    print(Dot,"/",6,sep='')