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

def main():
    inp = list(map(int, input().split()))
    Y = inp[0]
    W = inp[1]
    num = 6 - max(Y, W) + 1
    if(num % 2 == 1):
        if(num == 3):
            print('1/2')
        else:
            print(str(num) + '/6')
    else:
        if(num == 2):
            print('1/3')
            return
        if(num == 4):
            print('2/3')
        else:
            print('1/1')

main()
 		   		 	 		  	    	 	  	  	 	