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


a=raw_input().split(' ')
fe=1
min1=0
max1=-99999
if int(a[0])>int(a[1]) and int(a[0])>max1:
    max1=int(a[0])
    min1=int(a[1])
if int(a[1])>int(a[0]) and int(a[1])>max1:
    max1=int(a[1])
    min1=int(a[0])
if int(a[0])==int(a[1]):
    max1=int(a[1])
    min1=int(a[0])
hvjh=7-max1
for i in range(1,7):
    if hvjh%i==0 and 6%i==0:
        fe=i
if max1>1:
    asdf=str(hvjh/fe)
    asw=str(6/fe)
    print asdf+"/"+asw
if max1==1:
    print "1/1"