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

Y,M=map(eval,input("").split())
Q=max(Y,M)
Z=set()
for i in range(1,7):
    if i>=Q:
        Z.add(i)
    else:
        continue
A=len(Z)
B=6
if A==6:
    print("1/1")
elif A==0:
    print("0/1")
else:
    for i in range(2,B):
        while(A%i==0 and B%i==0):
            A=A//i
            B=B//i
    print("{}/{}".format(A,B))
 


		  	 	 	 	     	    	   		 			