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

input = sys.stdin.readline

############ ---- Input Functions ---- ############
def inp():
    return (int (input ()))


def inlt():
    return (list (map (int, input ().split ())))


def insr():
    s = input()
    return (list (s[:len (s) - 1]))


def invr():
    return (map (int, input ().split ()))


y, w = invr()
x = max(y,w)
x = 7 - x
if x == 1:
    print("1/6")
elif x == 2:
    print("1/3")
elif x == 3:
    print("1/2")
elif x == 4:
    print("2/3")
elif x == 5:
    print("5/6")
elif x == 6:
    print("1/1")