import datetime
import itertools

with open('file.txt', 'r') as f:
	read_data = f.read()
print 'Input {0}'.format(read_data)
a = []
a = read_data.split('/')
a = [int(x) for x in a]
days = []
months = []
years = []

comb=[]
comb = list(itertools.permutations(a, 3))
dates = []

for i in comb:
	four_digits = 0
	if len(str(i[2])) == 1 or len(str(i[2])) == 2:
		four_digits += i[2] + 2000
	try:
		date = datetime.date(day = i[0], month = i[1], year = four_digits)
	except:
		pass
	else:
		dates.append(date)

for b in dates:
	print b.strftime('%Y-%m-%d')
if dates:
	print 'Earliest date is', min(dates)
else:
	print 'Is illegal'