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

#import time
#start_time = time.time()

w, y = map(int, raw_input().split())
if max(w,y)!=1:
    if (7-max(w,y))%2==0:
        print str((7-max(w, y))/2)+'/3'
    elif (7-max(w,y))%3==0:
        print str((7-max(w,y))/3)+'/2'
    else:
        print str((7-max(w,y)))+'/6'
else:
    print '1/1'

#print time.time()-start_time

