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

rolls = input('').split(' ')
rolls = [int(i) for i in rolls]

max_roll = max(rolls)


numerator = (6 + 1 - max_roll)
denominator = 6

simplify = True

while simplify:
  if (numerator%2==0) and (denominator%2==0):
    numerator = int(numerator / 2)
    denominator = int(denominator / 2)
  elif (numerator%3==0) and (denominator%3==0):
    numerator = int(numerator / 3)
    denominator = int(denominator / 3)
  else:
    simplify = False

print(f'{numerator}/{denominator}')