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

#!/usr/bin/env python3

y=input()
y = '['+y+']'
d = {
		'[0 1]':'0/1',
		'[1 1]':'1/1',
		'[1 2]':'1/2',
		'[1 3]':'1/3',
		'[1 4]':'1/4',
		'[1 5]':'1/5',
		'[1 6]':'1/6',
		'[2 3]':'2/3',
		'[2 4]':'1/2',
		'[2 5]':'2/5',
		'[2 6]':'1/3',
		'[3 4]':'3/4',
		'[3 5]':'3/5',
		'[3 6]':'1/2',
		'[4 5]':'4/5',
		'[4 2]':'1/2',
		'[4 6]':'2/3',
		'[5 6]':'5/6',
	}
print(d[y])
