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

inp=input().split()
n1=int(inp[0])
n2=int(inp[1])
n=max(n1,n2)
count=0
for i in range(1,7):
    if(i>=n):
        count+=1
    
if(count==2):
    s="1/3"
    print(s)
elif(count==3):
    s="1/2"
    print(s)
elif(count==4):
    s="2/3"
    print(s)
elif(count==5):
    s="5/6"
    print(s)
elif(count==6):
    s="1/1"
    print(s)
elif(count==1):
    s="1/6"
    print(s)
else:
    s="0/1"
    print(s)
    
        