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 kmm(x):
    km=[]
    for _ in range(1,x+1):
        if x%_==0:
            km.append(_)
    return km
def shared(a,b):
    c=list(set(kmm(a))& set(kmm(b)))
    return c[-1]
ins=input()
Y,W = [int(i) for i in ins.split(" ")]
if(Y >6 or W >6 or Y <=0 or W <=0):
    print("0/1")
else:
    the_max=max(Y,W)
    o=7-the_max
    km=shared(o,6)
    print("%d/%d"%(1,6/o) if 6%o==0 else "%d/%d"%(o/km,6/km))



