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=[int(x) for x in input().split(" ")]
first=x[0]
second=x[1]
 
 
def get_div(num):
    for i in range(6,1,-1):
        if(num%i==0 and 6%i==0):
            return i
    return False
 
 
if(first<second):
    least=second
else:
    least=first
counter=0;  
for i in range(least,7):
    counter+=1
   
get=get_div(counter) 
if(get==False): 
    print("{}/{}".format(counter,6))
     
else:
   
    print("{}/{}".format(int(counter/get),int(6/get)))

    

    




            













