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

#yakko == y points "1 to 6"
#wakko == w points "1 to 6"
# if dot == wakko or yakko , dot wins
# output on format 1/2 .. 1/3 ....etc . if 0 "0/1" if 1 "1/1"
# basst === (6 - greatest number) + 1  ,, makam 6 

from fractions import Fraction
n = list(map(int , input().split()))
y = n[0]
w = n[1]

if y >= w:
    b = (6 - y) + 1
else:
    b = (6 - w) + 1

if Fraction(b , 6) == 1:
    print("1/1")
elif Fraction(b , 6) == 0:
    print("0/1")
else:
    print(Fraction(b , 6)) 
