import datetime

def uru(n):
  if (n%4==0 and n%100!=0) or n%400==0:
    return True
  else:
    return False

def solve(a,b,c):
  ans=[]
  if b==2 and c==27:
    if uru(a):
      year=str(a)
      month="02"
      day="29"
      ans=[year,month,day]
      print("/".join(ans))
      return
    else:
      year=str(a)
      month="03"
      day="01"
      ans=[year,month,day]
      print("/".join(ans))
      return
  now = datetime.datetime(a,b,c)
  now = now + datetime.timedelta(days=2)
  print(now.strftime("%Y/%m/%d"))
  return

date=[int(x) for x in input().split("/")]
solve(date[0],date[1],date[2])