import re
#convert month to calendar month
def getMonthCalendarName(monthNumericalVal):
 if monthNumericalVal == 0:
 monthNumericalVal = 1
 monthList = {1: "January",
 2: "February",
 3: "March",
 4: "April",
 5: "May",
 6: "June",
 7: "July",
 8: "August",
 9: "September",
 10: "October",
 11: "November",
 12: "December"}
 return monthList[monthNumericalVal]
#convert total number of months to years
def convertToYears(totalMonths):
 remainingMonths = totalMonths % 12
 totalYears = totalMonths // 12
 print("Your full retirement age is", totalYears, "and", remainingMonths, "months")
 return totalYears, remainingMonths
#find the retirement date by finding total months and converting to years
def retirementDate(totalYears, totalMonths, birthYear, birthMonth):
 totalMonths += birthMonth
 totalYears += totalMonths // 12
 totalMonths = totalMonths % 12
 retirementYear = birthYear + totalYears
 print("this will be in", getMonthCalendarName(totalMonths), "of", retirementYear, "n")
#find the total number of months to retirement then call retirementDate
def retirementCal(birthYear, birthMonth):
 retirementAge = 780 #base year 1937 converted to months
 if birthYear < 1900:
 print("Month or year invalid must be 1900 or latern")
 return
 elif birthMonth > 12 or birthMonth < 1:
 print("Months are from labeled as number 1-12, 1 for Januaryn")
 elif birthYear <= 1937:
 retirementAge = 780
 else:
 year = 1937
 while(year != birthYear):
 if year >= 1943 and year < 1954:
 retirementAge += 0
 elif year >= 1960:
 retirementAge += 0
 else:
 retirementAge += 2
 year += 1
 #print(year)
 totalYears, totalMonths = convertToYears(retirementAge)
 retirementDate(totalYears, totalMonths, birthYear, birthMonth)

def main():
 answer = ' '
 while answer != '':
 year = None
 month = None
 print("Social Security Full Retirement Age Calculator")
 answer = input("Enter the year of birth or to exit: ")
 #must be 4 digit number
 if re.search("[0-9]{4}", answer) and len(answer) == 4:
 year = int(answer)
 month = int(input("Enter birth month: "))
 retirementCal(year, month)
 elif answer == '':
 break
 else:
 print("invalid inputn")

main()