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 sys
import math
 
if __name__ == '__main__':
    inp = sys.stdin
    out = sys.stdout
    
    inps = inp.readline().split(' ')
    y = int(inps[0])
    w = int(inps[1])
    m = 6 - max(y, w) + 1
    b = 6
    if m % 2 == 0:
        m /= 2
        b /= 2
    if m % 3 == 0:
        m /= 3
        b /= 3
    out.write(str(m) + "/" + str(b) )
    
