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

from fractions import Fraction
n = input().split()
x = [0,0,0,0,0,0,0]
a = 0
if(int(n[0]) >= int(n[1])):
    for i in range(1,7):
        if(i >= int(n[0])):
            x[i] = 1
else:
    for i in range(1,7):
        if(i >= int(n[1])):
            x[i] = 1
for i in range(len(x)):
    if(x[i] == 1):
        a += 1
if(a == 6):
    print("1/1")
else:
    print(Fraction(a, 6))