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
num = input()
r1 = num.split(' ')
y = int(r1[0])
w = int(r1[1])
yflag = 0
probablity = 0
if y > w:
	yflag = 1
else:
	yflag = 0
if yflag == 1:
	for i in range(y,7):
		probablity = probablity + Fraction(1,6)
else:
	for i in range(w,7):
		probablity = probablity + Fraction(1,6)
if probablity == 0:
	print ("0/1")
elif probablity == 1:
	print("1/1")
else:
	print(probablity)