import fractions

if __name__ == "__main__":
  count_all, count_sum6 = 0, 0
  for i in range(1,6+1):
    for j in range(1,6+1):
      count_all += 1
      if i != j and i + j == 6:
         count_sum6 += 1
        
  print(fractions.Fraction(count_sum6, count_all))