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

w, y = input ().split ()
w, y = int (w), int (y)

r = 6
m = max (w, y)
if m == 1:
    print ("1/1")

else:
    m = r - m + 1
    for n in range(2,4):
        if m % n == 0 and r % n == 0:
            r = r/n
            r = int (r)
            m = m / n
            m = int(m)
            print (str (m) + "/" + str (r))
            break
    else:
        print (str (m) + "/" + str (r))