birthmonth=input("What numeric month were you born (1-12)?")
while True:
  try :
    month = int(birthmonth)
    break
  except ValueError:
    print("Put in a numeric")

if month > 12 :
  print("Error: your birth month should be between 1 and 12")
elif month == 12 :
  print("You were born in December")
elif month == 11 :
  print("You were born in November")
elif month == 10 :
  print("You were born in October")
elif month == 9 :
  print("You were born in September")
elif month == 8 :
  print("You were born in August")
elif month == 7 :
  print("You were born in July")
elif month == 6 :
  print("You were born in June")
elif month == 5 :
  print("You were born in May")
elif month == 4 :
  print("You were born in April")
elif month == 3 :
  print("You were born in March")
elif month == 2 :
  print("You were born in February")
elif month == 1 :
  print("You were born in January")

#= abs(12-month)
print("Your half birthday is in the month number"  , abs(12-month))