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,w=map(int,input().split())
def f(a,b):
    c=a%b
    if c==0:
        return b
    else:
        return f(b,c)
    
if y>6 and w>6:
    print('0/1')
elif y<1 and w<1:
    print('1/1')
else:
    mole=7-max(y,w)
    deno=6
    max_num=f(mole,deno)
    mole=mole//max_num
    deno=deno//max_num
    print(mole,'/',deno,sep='')
    

        
    