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

#!/usr/bin/python
i=raw_input()
c=[]
c+=i.split()
y=int(c[0])
w=int(c[1])
if 1<=y<=6 and 1<=w<=6 and len(c)==2:
    if y>=w:
        z=(6-y)+1
    elif y<=w:
        z=(6-w)+1
    if z/2 and not z%2 and 2<=z<=4:
        print '%s/%s'%((z/2),(6/2))
    elif z==3:
        print '%s/%s'%((z/3),(6/3))
    elif z/6:
        print '%s/%s'%((z/6),(6/6))
    else:
        print '%s/%s'%(z,6)            
    





