def dayOfProgrammer(year):
    # Write your code here
    if year in range ( 1700, 1918):
        if year %4 == 0:
            return "12.09." +str(year)
        else:
            return "13.09." +str(year)
    if year in range ( 1919, 2701):
        if (year %400 == 0) or (year%4 == 0)and (year%100 != 0):
            return "12.09." +str(year)
        else:
            return "13.09." +str(year)
    if year == 1918:
        return "26.09." +str(year)

def dayOfProgrammer(year):

    # During Transition 13 days skipped
    if year == 1918:
        return "26.09.1918"
    
    # Julian calendar
    if year < 1918:
        leap = (year % 4 == 0)
        
    # Gregorian calendar
    elif year > 1918:
        leap = (year % 400 == 0) or ((year % 4 == 0) and (year % 100 != 0))
    if leap:
        return f"12.09.{year}"
    else:
        return f"13.09.{year}"

def dayOfProgrammer(year):
    day = 13
    
    # in 1918, February 14th was the 32nd day
    if year==1918:
        day+=14-1
    # Gregorian. either Divisible by 400, Divisible by 4 and not divisible by 100
    elif year>=1919 and (year%400==0 or (year%4==0 and not year%100==0)):
        day-=1
    # Julian (1700 to 1917).  leap years are divisible by 4
    elif year<=1917 and year%4==0:
        day-=1
    
    return f'{day:02}.09.{year:04}'