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

#MAde BY the Control , Enjoy
from fractions import Fraction

line=input().split()
number_one=int(line[0])
number_two=int(line[1])




max_number=max(number_one,number_two)
prop = (6 - max_number + 1)
divided=prop/6
#print(prop)
if prop==1:
	print('1/6')
if prop==2:
	print(Fraction(1,3))
if prop==3:
	print(Fraction(1,2))
if prop==4:
	print(Fraction(2,3))
if prop==5:
	print(Fraction(5,6))
if prop==6:
	print('1/1')


