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 gcd(a,b):
    if(b==0):
        return a
    else:
        return gcd(b,a%b)

def irr_fraction(num,dem):
    g = gcd(num,dem)
    while(g>1):
        num/=g
        dem/=g
        g = gcd(num,dem)

    print str(num)+"/"+str(dem)


def solve(y,w):

    avlbl = min(6,6-max(y,w)+1)
    irr_fraction(avlbl,6)


if __name__ == "__main__":
    y,w = map(int,raw_input().split(" "))
    solve(y,w)