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/env python
# coding: utf-8

# In[38]:


#9A
inp = list(map(int, input().split()))
mx = max(inp)
nmrr = 6 - mx + 1
dmtr = 6
for i in (range(1, nmrr+1)[::-1]):
    if (dmtr % i == 0) and (nmrr % i == 0):
        dmtr = dmtr // i
        nmrr = nmrr // i
        break
print('{}/{}'.format(nmrr,dmtr))


# In[ ]:




