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

#Codeforces 6A


def lowest_form(a):
    if a%2==0:
        if(a//2==3):
            return '1/1'
        else: return str(a//2)+'/3'
    elif a%3==0:
        if(a//3==2): return ('1/1')
        else: return str(a//3)+'/2'
    elif a==0:    
        return '0/1'
    elif a==6:
        return '1/1'
    else: return str(a)+'/6'



y,w = map(int,input().split())
if y<w:
    a=(6-w+1)
    print(lowest_form(a))
else:
    a=(6-y+1)
    print(lowest_form(a))
