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

'''input
6 1
'''

import sys

def function(a,b):
	prob = 6-max(a,b)+1
	if prob == 1 or prob==5: return f'{prob}/6'
	elif prob == 2 or prob==4: return f'{int(prob/2)}/3'
	elif prob == 3: return '1/2'
	elif prob == 6: return '1/1'	

def main():
	a,b = map(int,sys.stdin.readline().split())
	res = function(a,b)
	print(res)


if __name__ == '__main__':
    main()
