monthly_last_days = {
  1 => 31,
  2 => 28,
  3 => 31,
  4 => 30,
  5 => 31,
  6 => 30,
  7 => 31,
  8 => 31,
  9 => 30,
  10 => 31,
  11 => 30,
  12 => 31,
}

# うるう年判定
def check_leap_year(year)
  if year % 400 == 0
    true
  elsif year % 4 == 0 && year % 100 == 0
    false
  elsif year % 4 == 0
    true
  else
    false
  end
end

# 入力受付
year, month, day = gets.split('/').map(&:to_i)

# うるう年の場合は２月の最終日を変更
monthly_last_days[2] = 29 if check_leap_year(year)

# メインロジック
if (day + 2) > monthly_last_days[month]
  day = (day + 2) % monthly_last_days[month]
  month += 1
  if month > 12
    month = month % 12
    year += 1
  end
else
  day += 2
end

# 回答
puts "#{year}/#{month.to_s.rjust(2, '0')}/#{day.to_s.rjust(2, '0')}"