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

import sys
import collections

input = sys.stdin.readline

def rints():
    return map(int, input().strip().split())
def rint():
    return int(input().strip())
def rintas():
    return [int(i) for i in input().strip().split()]
def gcd(a, b):
    if a == 0:
        return b
    return gcd(a%b, a)
    
mod = pow(10, 9) + 7
y, w = rints()
cnt = 0
for i in [1,2,3,4,5,6]:
    if max(y,w,i) == i: cnt += 1

if cnt == 0:
    print("0/1")
elif cnt == 6:
    print("1/1")
elif cnt == 1:
    print("1/6")
elif cnt == 2:
    print("1/3")
elif cnt == 3:
    print("1/2")
elif cnt == 4:
    print("2/3")
elif cnt == 5:
    print("5/6")
    

