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

x=input().split()
y=int(x[0])
w=int(x[1])
num=0
denum=6
max=0
if(y>w):
    max=y
else:
    max=w
count=0    
for i in range(max,7):
    count=count+1
num=count
j=1
while((j<=num)and (j<=denum)):
    if((num%j==0)and (denum%j==0)):
        gcd=j
    j+=1
    
num=int(num/gcd)
denum=int(denum/gcd)
print("%d/%d"%(num,denum))