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


numbers = input().split()

bigger = max(int(numbers[0]), int(numbers[1]))

diceNumbers = [1, 2, 3 , 4, 5, 6]

remainingNumbers = [1, 2, 3 , 4, 5, 6]

for index in range(len(diceNumbers)):

    element = diceNumbers[index]

    if element < bigger:
        remainingNumbers.remove(element)

if len(remainingNumbers) == len(diceNumbers):
    print("1/1")

else:

    up = len(remainingNumbers)
    down = len(diceNumbers)

    if up != 1 and down % up == 0:

        down /= up
        up /= up

    elif up % 2 == 0 and down % 2 == 0:
        up /= 2
        down /= 2
    
    elif up % 3 == 0 and down % 3 == 0:
        up /= 3
        down /= 3

    print(str(int(up)) +  "/" + str(int(down)))
    
		   		  				 	  	 	  				  	 	