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

v = raw_input()
v = v.split()
y = int(v[0])
w = int(v[1])
d=0

if y>=w: p = y
else: p = w

for i in range(1, 7):
    if i >= p:
        d +=1

if d == 1 :
    print '1/6'
if d == 2 :
    print '1/3'
if d == 3 :
    print '1/2'
if d == 4 :
    print '2/3'
if d == 5 :
    print '5/6'
if d == 6 :
    print '1/1'